396829680 has 80 divisors (see below), whose sum is σ = 1324811040. Its totient is φ = 97680384.

The previous prime is 396829673. The next prime is 396829703. The reversal of 396829680 is 86928693.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60475 + ... + 66714.

It is an arithmetic number, because the mean of its divisors is an integer number (16560138).

Almost surely, 2^396829680 is an apocalyptic number.

396829680 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

396829680 is an abundant number, since it is smaller than the sum of its proper divisors (927981360).

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

396829680 is a wasteful number, since it uses less digits than its factorization.

396829680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127218 (or 127212 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 51.

The square root of 396829680 is about 19920.5843287791. The cubic root of 396829680 is about 734.8545410702.

The spelling of 396829680 in words is "three hundred ninety-six million, eight hundred twenty-nine thousand, six hundred eighty".