307912 has 16 divisors (see below), whose sum is σ = 630000. Its totient is φ = 139920.

The previous prime is 307903. The next prime is 307919. The reversal of 307912 is 219703.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (307919) by changing a digit.

307912 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1662 + ... + 1837.

It is an arithmetic number, because the mean of its divisors is an integer number (39375).

2³⁰⁷⁹¹² is an apocalyptic number.

It is an amenable number.

307912 is an abundant number, since it is smaller than the sum of its proper divisors (322088).

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

307912 is a wasteful number, since it uses less digits than its factorization.

307912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3516 (or 3512 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 307912 is about 554.8981888599. The cubic root of 307912 is about 67.5267018272.

Subtracting from 307912 its reverse (219703), we obtain a square (88209 = 297²).

The spelling of 307912 in words is "three hundred seven thousand, nine hundred twelve".