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12245380 = 2257471861
BaseRepresentation
bin101110101101…
…100110000100
3212001010111121
4232231212010
511113323010
61114243324
7206040550
oct56554604
925033447
1012245380
116a04154
124126544
1326c98b4
1418aa860
15111d3da
hexbad984

12245380 has 48 divisors (see below), whose sum is σ = 30030336. Its totient is φ = 4106880.

The previous prime is 12245371. The next prime is 12245381. The reversal of 12245380 is 8354221.

12245380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (12245381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5650 + ... + 7510.

It is an arithmetic number, because the mean of its divisors is an integer number (625632).

Almost surely, 212245380 is an apocalyptic number.

12245380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12245380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15015168).

12245380 is an abundant number, since it is smaller than the sum of its proper divisors (17784956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12245380 is a wasteful number, since it uses less digits than its factorization.

12245380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1924 (or 1922 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 12245380 is about 3499.3399377597. The cubic root of 12245380 is about 230.4928310737.

The spelling of 12245380 in words is "twelve million, two hundred forty-five thousand, three hundred eighty".

Divisors: 1 2 4 5 7 10 14 20 28 35 47 70 94 140 188 235 329 470 658 940 1316 1645 1861 3290 3722 6580 7444 9305 13027 18610 26054 37220 52108 65135 87467 130270 174934 260540 349868 437335 612269 874670 1224538 1749340 2449076 3061345 6122690 12245380