397426900 has 72 divisors (see below), whose sum is σ = 932690304. Its totient is φ = 146121600.

The previous prime is 397426889. The next prime is 397426921. The reversal of 397426900 is 9624793.

It is a super-2 number, since 2×397426900² = 315896281687220000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 403809 + ... + 404791.

It is an arithmetic number, because the mean of its divisors is an integer number (12954032).

Almost surely, 2^397426900 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397426900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (466345152).

397426900 is an abundant number, since it is smaller than the sum of its proper divisors (535263404).

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

397426900 is a wasteful number, since it uses less digits than its factorization.

397426900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321 (or 1314 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 397426900 is about 19935.5687152386. The cubic root of 397426900 is about 735.2230029670.

The spelling of 397426900 in words is "three hundred ninety-seven million, four hundred twenty-six thousand, nine hundred".