649867624 has 16 divisors (see below), whose sum is σ = 1392573600. Its totient is φ = 278514672.

The previous prime is 649867613. The next prime is 649867661. The reversal of 649867624 is 426768946.

It is a happy number.

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, 5802334 + ... + 5802445.

It is an arithmetic number, because the mean of its divisors is an integer number (87035850).

Almost surely, 2^649867624 is an apocalyptic number.

It is an amenable number.

649867624 is an abundant number, since it is smaller than the sum of its proper divisors (742705976).

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

649867624 is a wasteful number, since it uses less digits than its factorization.

649867624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11604792 (or 11604788 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 52.

The square root of 649867624 is about 25492.5013288222. The cubic root of 649867624 is about 866.1802965958.

The spelling of 649867624 in words is "six hundred forty-nine million, eight hundred sixty-seven thousand, six hundred twenty-four".