647089388 has 24 divisors (see below), whose sum is σ = 1265486544. Its totient is φ = 286956800.

The previous prime is 647089379. The next prime is 647089397. The reversal of 647089388 is 883980746.

It is a happy number.

647089388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (647089379) and next prime (647089397).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177545 + ... + 181152.

It is an arithmetic number, because the mean of its divisors is an integer number (52728606).

Almost surely, 2^647089388 is an apocalyptic number.

It is an amenable number.

647089388 is a deficient number, since it is larger than the sum of its proper divisors (618397156).

647089388 is a wasteful number, since it uses less digits than its factorization.

647089388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358753 (or 358751 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 53.

The square root of 647089388 is about 25437.9517257188. The cubic root of 647089388 is about 864.9442034688.

The spelling of 647089388 in words is "six hundred forty-seven million, eighty-nine thousand, three hundred eighty-eight".