397679280 has 40 divisors (see below), whose sum is σ = 1232806512. Its totient is φ = 106047744.

The previous prime is 397679279. The next prime is 397679281. The reversal of 397679280 is 82976793.

It is an interprime number because it is at equal distance from previous prime (397679279) and next prime (397679281).

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (397679281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 828259 + ... + 828738.

Almost surely, 2^397679280 is an apocalyptic number.

397679280 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

397679280 is an abundant number, since it is smaller than the sum of its proper divisors (835127232).

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

397679280 is a wasteful number, since it uses less digits than its factorization.

397679280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1657013 (or 1657007 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 51.

The square root of 397679280 is about 19941.8976027859. The cubic root of 397679280 is about 735.3786008201.

The spelling of 397679280 in words is "three hundred ninety-seven million, six hundred seventy-nine thousand, two hundred eighty".