397415970 has 480 divisors, whose sum is σ = 1430161920. Its totient is φ = 78382080.

The previous prime is 397415959. The next prime is 397416007. The reversal of 397415970 is 79514793.

It is a super-2 number, since 2×397415970² = 315878906422081800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 12819855 + ... + 12819885.

It is an arithmetic number, because the mean of its divisors is an integer number (2979504).

Almost surely, 2^397415970 is an apocalyptic number.

397415970 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 397415970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (715080960).

397415970 is an abundant number, since it is smaller than the sum of its proper divisors (1032745950).

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

397415970 is a wasteful number, since it uses less digits than its factorization.

397415970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The square root of 397415970 is about 19935.2945802163. The cubic root of 397415970 is about 735.2162628922.

The spelling of 397415970 in words is "three hundred ninety-seven million, four hundred fifteen thousand, nine hundred seventy".