647420904 has 64 divisors (see below), whose sum is σ = 1936737600. Its totient is φ = 199205568.

The previous prime is 647420899. The next prime is 647420923. The reversal of 647420904 is 409024746.

647420904 is a `hidden beast` number, since 647 + 4 + 2 + 0 + 9 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112474 + ... + 118089.

It is an arithmetic number, because the mean of its divisors is an integer number (30261525).

Almost surely, 2^647420904 is an apocalyptic number.

It is an amenable number.

647420904 is an abundant number, since it is smaller than the sum of its proper divisors (1289316696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

647420904 is a wasteful number, since it uses less digits than its factorization.

647420904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230591 (or 230581 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 647420904 is about 25444.4670606401. The cubic root of 647420904 is about 865.0918872839.

The spelling of 647420904 in words is "six hundred forty-seven million, four hundred twenty thousand, nine hundred four".