397252020 has 48 divisors (see below), whose sum is σ = 1213426368. Its totient is φ = 96303360.

The previous prime is 397251989. The next prime is 397252061. The reversal of 397252020 is 20252793.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 15 ways as a sum of consecutive naturals, for example, 300289 + ... + 301608.

It is an arithmetic number, because the mean of its divisors is an integer number (25279716).

Almost surely, 2^397252020 is an apocalyptic number.

397252020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

397252020 is an abundant number, since it is smaller than the sum of its proper divisors (816174348).

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

397252020 is a wasteful number, since it uses less digits than its factorization.

397252020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601920 (or 601918 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 397252020 is about 19931.1821024243. The cubic root of 397252020 is about 735.1151469374.

The spelling of 397252020 in words is "three hundred ninety-seven million, two hundred fifty-two thousand, twenty".