649323832 has 8 divisors (see below), whose sum is σ = 1217482200. Its totient is φ = 324661912.

The previous prime is 649323817. The next prime is 649323839. The reversal of 649323832 is 238323946.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649323839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40582732 + ... + 40582747.

It is an arithmetic number, because the mean of its divisors is an integer number (152185275).

Almost surely, 2^649323832 is an apocalyptic number.

It is an amenable number.

649323832 is a deficient number, since it is larger than the sum of its proper divisors (568158368).

649323832 is a wasteful number, since it uses less digits than its factorization.

649323832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81165485 (or 81165481 counting only the distinct ones).

The product of its digits is 186624, while the sum is 40.

The square root of 649323832 is about 25481.8333720319. The cubic root of 649323832 is about 865.9386302732.

The spelling of 649323832 in words is "six hundred forty-nine million, three hundred twenty-three thousand, eight hundred thirty-two".