649890204 has 24 divisors (see below), whose sum is σ = 1522459008. Its totient is φ = 215766000.

The previous prime is 649890181. The next prime is 649890253. The reversal of 649890204 is 402098946.

649890204 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 104872 + ... + 110895.

It is an arithmetic number, because the mean of its divisors is an integer number (63435792).

Almost surely, 2^649890204 is an apocalyptic number.

It is an amenable number.

649890204 is an abundant number, since it is smaller than the sum of its proper divisors (872568804).

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

649890204 is a wasteful number, since it uses less digits than its factorization.

649890204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216025 (or 216023 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 649890204 is about 25492.9442003077. The cubic root of 649890204 is about 866.1903284463.

The spelling of 649890204 in words is "six hundred forty-nine million, eight hundred ninety thousand, two hundred four".