397611990 has 80 divisors (see below), whose sum is σ = 1098112752. Its totient is φ = 103156416.

The previous prime is 397611941. The next prime is 397612001. The reversal of 397611990 is 99116793.

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

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 23337 + ... + 36603.

Almost surely, 2^397611990 is an apocalyptic number.

397611990 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 397611990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (549056376).

397611990 is an abundant number, since it is smaller than the sum of its proper divisors (700500762).

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

397611990 is a wasteful number, since it uses less digits than its factorization.

397611990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13323 (or 13314 counting only the distinct ones).

The product of its (nonzero) digits is 91854, while the sum is 45.

The square root of 397611990 is about 19940.2103800336. The cubic root of 397611990 is about 735.3371214842.

The spelling of 397611990 in words is "three hundred ninety-seven million, six hundred eleven thousand, nine hundred ninety".