307664564 has 6 divisors (see below), whose sum is σ = 538412994. Its totient is φ = 153832280.

The previous prime is 307664557. The next prime is 307664593. The reversal of 307664564 is 465466703.

It can be written as a sum of positive squares in only one way, i.e., 228312100 + 79352464 = 15110^2 + 8908^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38458067 + ... + 38458074.

It is an arithmetic number, because the mean of its divisors is an integer number (89735499).

Almost surely, 2^307664564 is an apocalyptic number.

It is an amenable number.

307664564 is a deficient number, since it is larger than the sum of its proper divisors (230748430).

307664564 is a wasteful number, since it uses less digits than its factorization.

307664564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76916145 (or 76916143 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 41.

The square root of 307664564 is about 17540.3695514091. The cubic root of 307664564 is about 675.0860897969.

The spelling of 307664564 in words is "three hundred seven million, six hundred sixty-four thousand, five hundred sixty-four".