397944576 has 108 divisors (see below), whose sum is σ = 1190053592. Its totient is φ = 132627456.

The previous prime is 397944559. The next prime is 397944587. The reversal of 397944576 is 675449793.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (108).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59010 + ... + 65406.

Almost surely, 2^397944576 is an apocalyptic number.

397944576 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397944576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (595026796).

397944576 is an abundant number, since it is smaller than the sum of its proper divisors (792109016).

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

397944576 is an frugal number, since it uses more digits than its factorization.

397944576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6428 (or 6402 counting only the distinct ones).

The product of its digits is 5715360, while the sum is 54.

The square root of 397944576 is about 19948.5482178528. The cubic root of 397944576 is about 735.5420907179.

The spelling of 397944576 in words is "three hundred ninety-seven million, nine hundred forty-four thousand, five hundred seventy-six".