649642926 has 16 divisors (see below), whose sum is σ = 1299731328. Its totient is φ = 216473400.

The previous prime is 649642919. The next prime is 649642937. The reversal of 649642926 is 629246946.

It is a happy number.

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, 2181 + ... + 36111.

It is an arithmetic number, because the mean of its divisors is an integer number (81233208).

Almost surely, 2^649642926 is an apocalyptic number.

649642926 is an abundant number, since it is smaller than the sum of its proper divisors (650088402).

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

649642926 is a wasteful number, since it uses less digits than its factorization.

649642926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37127.

The product of its digits is 1119744, while the sum is 48.

The square root of 649642926 is about 25488.0938086786. The cubic root of 649642926 is about 866.0804550234.

The spelling of 649642926 in words is "six hundred forty-nine million, six hundred forty-two thousand, nine hundred twenty-six".