649105204 has 24 divisors (see below), whose sum is σ = 1262586528. Its totient is φ = 289479840.

The previous prime is 649105199. The next prime is 649105211. The reversal of 649105204 is 402501946.

It is a congruent number.

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, 136842 + ... + 141505.

It is an arithmetic number, because the mean of its divisors is an integer number (52607772).

Almost surely, 2^649105204 is an apocalyptic number.

It is an amenable number.

649105204 is a deficient number, since it is larger than the sum of its proper divisors (613481324).

649105204 is a wasteful number, since it uses less digits than its factorization.

649105204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278415 (or 278413 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 649105204 is about 25477.5431311577. The cubic root of 649105204 is about 865.8414318886.

The spelling of 649105204 in words is "six hundred forty-nine million, one hundred five thousand, two hundred four".