397385472 has 144 divisors (see below), whose sum is σ = 1222083072. Its totient is φ = 113295360.

The previous prime is 397385447. The next prime is 397385477. The reversal of 397385472 is 274583793.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397385477) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142233 + ... + 144999.

It is an arithmetic number, because the mean of its divisors is an integer number (8486688).

Almost surely, 2^397385472 is an apocalyptic number.

397385472 is a gapful number since it is divisible by the number (32) 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 397385472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (611041536).

397385472 is an abundant number, since it is smaller than the sum of its proper divisors (824697600).

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

397385472 is a wasteful number, since it uses less digits than its factorization.

397385472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2814 (or 2800 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 48.

The square root of 397385472 is about 19934.5296408017. The cubic root of 397385472 is about 735.1974553950.

The spelling of 397385472 in words is "three hundred ninety-seven million, three hundred eighty-five thousand, four hundred seventy-two".