646047432 has 48 divisors (see below), whose sum is σ = 1770809040. Its totient is φ = 212752608.

The previous prime is 646047431. The next prime is 646047487. The reversal of 646047432 is 234740646.

646047432 is a `hidden beast` number, since 6 + 4 + 604 + 7 + 43 + 2 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (646047431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48078 + ... + 60029.

It is an arithmetic number, because the mean of its divisors is an integer number (36891855).

Almost surely, 2^646047432 is an apocalyptic number.

It is an amenable number.

646047432 is an abundant number, since it is smaller than the sum of its proper divisors (1124761608).

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

646047432 is a wasteful number, since it uses less digits than its factorization.

646047432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108202 (or 108195 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 36.

The square root of 646047432 is about 25417.4631306903. The cubic root of 646047432 is about 864.4797040346.

The spelling of 646047432 in words is "six hundred forty-six million, forty-seven thousand, four hundred thirty-two".