645914392 has 32 divisors (see below), whose sum is σ = 1246240080. Its totient is φ = 313705600.

The previous prime is 645914363. The next prime is 645914447. The reversal of 645914392 is 293419546.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35283 + ... + 50365.

Almost surely, 2^645914392 is an apocalyptic number.

It is an amenable number.

645914392 is a deficient number, since it is larger than the sum of its proper divisors (600325688).

645914392 is a wasteful number, since it uses less digits than its factorization.

645914392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15243 (or 15239 counting only the distinct ones).

The product of its digits is 233280, while the sum is 43.

The square root of 645914392 is about 25414.8458976245. The cubic root of 645914392 is about 864.4203594366.

The spelling of 645914392 in words is "six hundred forty-five million, nine hundred fourteen thousand, three hundred ninety-two".