397632480 has 96 divisors (see below), whose sum is σ = 1431489024. Its totient is φ = 90886656.

The previous prime is 397632457. The next prime is 397632491. The reversal of 397632480 is 84236793.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×397632480² = 316223178301900800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 55812 + ... + 62531.

It is an arithmetic number, because the mean of its divisors is an integer number (14911344).

Almost surely, 2^397632480 is an apocalyptic number.

397632480 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

397632480 is an abundant number, since it is smaller than the sum of its proper divisors (1033856544).

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

397632480 is a wasteful number, since it uses less digits than its factorization.

397632480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118368 (or 118360 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 42.

The square root of 397632480 is about 19940.7241593679. The cubic root of 397632480 is about 735.3497525577.

The spelling of 397632480 in words is "three hundred ninety-seven million, six hundred thirty-two thousand, four hundred eighty".