397558980 has 216 divisors, whose sum is σ = 1493174592. Its totient is φ = 83835648.

The previous prime is 397558943. The next prime is 397558981. The reversal of 397558980 is 89855793.

397558980 is a `hidden beast` number, since 3 + 9 + 7 + 558 + 9 + 80 = 666.

It is not an unprimeable number, because it can be changed into a prime (397558981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 212007 + ... + 213873.

Almost surely, 2^397558980 is an apocalyptic number.

397558980 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397558980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (746587296).

397558980 is an abundant number, since it is smaller than the sum of its proper divisors (1095615612).

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

397558980 is a wasteful number, since it uses less digits than its factorization.

397558980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1915 (or 1897 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 54.

The square root of 397558980 is about 19938.8811120384. The cubic root of 397558980 is about 735.3044414224.

The spelling of 397558980 in words is "three hundred ninety-seven million, five hundred fifty-eight thousand, nine hundred eighty".