307128965 has 16 divisors (see below), whose sum is σ = 432988416. Its totient is φ = 206184000.

The previous prime is 307128949. The next prime is 307128989. The reversal of 307128965 is 569821703.

It is not a de Polignac number, because 307128965 - 2⁴ = 307128949 is a prime.

It is a super-2 number, since 2×307128965² = 188656402283942450, which contains 22 as substring.

It is a Duffinian number.

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 15 ways as a sum of consecutive naturals, for example, 214061 + ... + 215490.

It is an arithmetic number, because the mean of its divisors is an integer number (27061776).

Almost surely, 2^307128965 is an apocalyptic number.

It is an amenable number.

307128965 is a deficient number, since it is larger than the sum of its proper divisors (125859451).

307128965 is a wasteful number, since it uses less digits than its factorization.

307128965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429580.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 307128965 is about 17525.0952921803. The cubic root of 307128965 is about 674.6941202119.

The spelling of 307128965 in words is "three hundred seven million, one hundred twenty-eight thousand, nine hundred sixty-five".