649478604 has 12 divisors (see below), whose sum is σ = 1515450104. Its totient is φ = 216492864.

The previous prime is 649478563. The next prime is 649478611. The reversal of 649478604 is 406874946.

It is a tau number, because it is divible by the number of its divisors (12).

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, 27061597 + ... + 27061620.

Almost surely, 2^649478604 is an apocalyptic number.

It is an amenable number.

649478604 is an abundant number, since it is smaller than the sum of its proper divisors (865971500).

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

649478604 is a wasteful number, since it uses less digits than its factorization.

649478604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54123224 (or 54123222 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 48.

The square root of 649478604 is about 25484.8700997278. The cubic root of 649478604 is about 866.0074261498.

The spelling of 649478604 in words is "six hundred forty-nine million, four hundred seventy-eight thousand, six hundred four".