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1310380 = 22565519
BaseRepresentation
bin100111111111010101100
32110120111121
410333322230
5313413010
644030324
714065231
oct4777254
92416447
101310380
11815565
125323a4
1336b596
14261788
151ad3da
hex13feac

1310380 has 12 divisors (see below), whose sum is σ = 2751840. Its totient is φ = 524144.

The previous prime is 1310371. The next prime is 1310381. The reversal of 1310380 is 830131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1310381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32740 + ... + 32779.

It is an arithmetic number, because the mean of its divisors is an integer number (229320).

21310380 is an apocalyptic number.

1310380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1310380 is an abundant number, since it is smaller than the sum of its proper divisors (1441460).

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

1310380 is a wasteful number, since it uses less digits than its factorization.

1310380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65528 (or 65526 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1310380 is about 1144.7183059600. The cubic root of 1310380 is about 109.4289970115.

Subtracting from 1310380 its reverse (830131), we obtain a square (480249 = 6932).

It can be divided in two parts, 13 and 10380, that multiplied together give a triangular number (134940 = T519).

The spelling of 1310380 in words is "one million, three hundred ten thousand, three hundred eighty".

Divisors: 1 2 4 5 10 20 65519 131038 262076 327595 655190 1310380