307697388 has 12 divisors (see below), whose sum is σ = 717960600. Its totient is φ = 102565792.

The previous prime is 307697353. The next prime is 307697389. The reversal of 307697388 is 883796703.

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

It is a self number, because there is not a number n which added to its sum of digits gives 307697388.

It is not an unprimeable number, because it can be changed into a prime (307697389) 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, 12820713 + ... + 12820736.

It is an arithmetic number, because the mean of its divisors is an integer number (59830050).

Almost surely, 2^307697388 is an apocalyptic number.

It is an amenable number.

307697388 is an abundant number, since it is smaller than the sum of its proper divisors (410263212).

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

307697388 is a wasteful number, since it uses less digits than its factorization.

307697388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25641456 (or 25641454 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 51.

The square root of 307697388 is about 17541.3051965924. The cubic root of 307697388 is about 675.1100967192.

The spelling of 307697388 in words is "three hundred seven million, six hundred ninety-seven thousand, three hundred eighty-eight".