396128421632 has 36 divisors (see below), whose sum is σ = 790970359200. Its totient is φ = 197998860288.

The previous prime is 396128421607. The next prime is 396128421697. The reversal of 396128421632 is 236124821693.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 526793 + ... + 1034295.

Almost surely, 2^396128421632 is an apocalyptic number.

396128421632 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

396128421632 is a deficient number, since it is larger than the sum of its proper divisors (394841937568).

396128421632 is an equidigital number, since it uses as much as digits as its factorization.

396128421632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510568 (or 510554 counting only the distinct ones).

The product of its digits is 746496, while the sum is 47.

The spelling of 396128421632 in words is "three hundred ninety-six billion, one hundred twenty-eight million, four hundred twenty-one thousand, six hundred thirty-two".