397651100 has 144 divisors (see below), whose sum is σ = 1101762816. Its totient is φ = 120960000.

The previous prime is 397650991. The next prime is 397651123. The reversal of 397651100 is 1156793.

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 47 ways as a sum of consecutive naturals, for example, 330500 + ... + 331700.

Almost surely, 2^397651100 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 397651100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (550881408).

397651100 is an abundant number, since it is smaller than the sum of its proper divisors (704111716).

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

397651100 is a wasteful number, since it uses less digits than its factorization.

397651100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276 (or 1269 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 32.

The square root of 397651100 is about 19941.1910376487. The cubic root of 397651100 is about 735.3612304922.

The spelling of 397651100 in words is "three hundred ninety-seven million, six hundred fifty-one thousand, one hundred".