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308220 = 223511467
BaseRepresentation
bin1001011001111111100
3120122210120
41023033330
534330340
610334540
72422413
oct1131774
9518716
10308220
111a0630
1212a450
13aa3a3
148047a
15614d0
hex4b3fc

308220 has 48 divisors (see below), whose sum is σ = 943488. Its totient is φ = 74560.

The previous prime is 308219. The next prime is 308249. The reversal of 308220 is 22803.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 308220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 427 + ... + 893.

It is an arithmetic number, because the mean of its divisors is an integer number (19656).

2308220 is an apocalyptic number.

308220 is a gapful number since it is divisible by the number (30) 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 308220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (471744).

308220 is an abundant number, since it is smaller than the sum of its proper divisors (635268).

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

308220 is a wasteful number, since it uses less digits than its factorization.

308220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490 (or 488 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 308220 is about 555.1756478809. The cubic root of 308220 is about 67.5492096577.

It can be divided in two parts, 308 and 220, that added together give a triangular number (528 = T32).

The spelling of 308220 in words is "three hundred eight thousand, two hundred twenty".

Divisors: 1 2 3 4 5 6 10 11 12 15 20 22 30 33 44 55 60 66 110 132 165 220 330 467 660 934 1401 1868 2335 2802 4670 5137 5604 7005 9340 10274 14010 15411 20548 25685 28020 30822 51370 61644 77055 102740 154110 308220