649132704 has 144 divisors (see below), whose sum is σ = 2088646560. Its totient is φ = 196680960.

The previous prime is 649132669. The next prime is 649132721. The reversal of 649132704 is 407231946.

649132704 is a `hidden beast` number, since 649 + 1 + 3 + 2 + 7 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81742 + ... + 89330.

It is an arithmetic number, because the mean of its divisors is an integer number (14504490).

Almost surely, 2^649132704 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649132704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1044323280).

649132704 is an abundant number, since it is smaller than the sum of its proper divisors (1439513856).

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

649132704 is a wasteful number, since it uses less digits than its factorization.

649132704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7625 (or 7605 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 649132704 is about 25478.0828164130. The cubic root of 649132704 is about 865.8536591326.

The spelling of 649132704 in words is "six hundred forty-nine million, one hundred thirty-two thousand, seven hundred four".