645352304 has 20 divisors (see below), whose sum is σ = 1254090864. Its totient is φ = 321715968.

The previous prime is 645352297. The next prime is 645352313. The reversal of 645352304 is 403253546.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54452 + ... + 65235.

Almost surely, 2^645352304 is an apocalyptic number.

It is an amenable number.

645352304 is a deficient number, since it is larger than the sum of its proper divisors (608738560).

645352304 is a wasteful number, since it uses less digits than its factorization.

645352304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120032 (or 120026 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 32.

The square root of 645352304 is about 25403.7852297645. The cubic root of 645352304 is about 864.1695412032.

The spelling of 645352304 in words is "six hundred forty-five million, three hundred fifty-two thousand, three hundred four".