397975086 has 48 divisors (see below), whose sum is σ = 913957200. Its totient is φ = 128362320.

The previous prime is 397975079. The next prime is 397975087. The reversal of 397975086 is 680579793.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397975087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48060 + ... + 55728.

It is an arithmetic number, because the mean of its divisors is an integer number (19040775).

Almost surely, 2^397975086 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397975086, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (456978600).

397975086 is an abundant number, since it is smaller than the sum of its proper divisors (515982114).

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

397975086 is a wasteful number, since it uses less digits than its factorization.

397975086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7742 (or 7705 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 54.

The square root of 397975086 is about 19949.3129204993. The cubic root of 397975086 is about 735.5608879885.

The spelling of 397975086 in words is "three hundred ninety-seven million, nine hundred seventy-five thousand, eighty-six".