307185972 has 12 divisors (see below), whose sum is σ = 716767296. Its totient is φ = 102395320.

The previous prime is 307185959. The next prime is 307186003. The reversal of 307185972 is 279581703.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12799404 + ... + 12799427.

It is an arithmetic number, because the mean of its divisors is an integer number (59730608).

Almost surely, 2^307185972 is an apocalyptic number.

It is an amenable number.

307185972 is an abundant number, since it is smaller than the sum of its proper divisors (409581324).

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

307185972 is a wasteful number, since it uses less digits than its factorization.

307185972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25598838 (or 25598836 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 42.

The square root of 307185972 is about 17526.7216558032. The cubic root of 307185972 is about 674.7358615352.

The spelling of 307185972 in words is "three hundred seven million, one hundred eighty-five thousand, nine hundred seventy-two".