649644792 has 32 divisors (see below), whose sum is σ = 1624761600. Its totient is φ = 216461664.

The previous prime is 649644791. The next prime is 649644803. The reversal of 649644792 is 297446946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649644791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90603 + ... + 97509.

It is an arithmetic number, because the mean of its divisors is an integer number (50773800).

Almost surely, 2^649644792 is an apocalyptic number.

It is an amenable number.

649644792 is an abundant number, since it is smaller than the sum of its proper divisors (975116808).

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

649644792 is a wasteful number, since it uses less digits than its factorization.

649644792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10835 (or 10831 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 51.

The square root of 649644792 is about 25488.1304139790. The cubic root of 649644792 is about 866.0812842505.

The spelling of 649644792 in words is "six hundred forty-nine million, six hundred forty-four thousand, seven hundred ninety-two".