408971632 has 20 divisors (see below), whose sum is σ = 796494160. Its totient is φ = 203424768.

The previous prime is 408971611. The next prime is 408971639. The reversal of 408971632 is 236179804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408971639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63132 + ... + 69307.

It is an arithmetic number, because the mean of its divisors is an integer number (39824708).

Almost surely, 2^408971632 is an apocalyptic number.

It is an amenable number.

408971632 is a deficient number, since it is larger than the sum of its proper divisors (387522528).

408971632 is a wasteful number, since it uses less digits than its factorization.

408971632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132640 (or 132634 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 408971632 is about 20223.0470503334. The cubic root of 408971632 is about 742.2742500146.

The spelling of 408971632 in words is "four hundred eight million, nine hundred seventy-one thousand, six hundred thirty-two".