397463220 has 384 divisors, whose sum is σ = 1574092800. Its totient is φ = 81544320.

The previous prime is 397463203. The next prime is 397463243. The reversal of 397463220 is 22364793.

It is a happy number.

397463220 is a `hidden beast` number, since 397 + 46 + 3 + 220 = 666.

It is a super-2 number, since 2×397463220² = 315954022505536800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5031141 + ... + 5031219.

It is an arithmetic number, because the mean of its divisors is an integer number (4099200).

Almost surely, 2^397463220 is an apocalyptic number.

397463220 is a gapful number since it is divisible by the number (30) 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 397463220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (787046400).

397463220 is an abundant number, since it is smaller than the sum of its proper divisors (1176629580).

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

397463220 is a wasteful number, since it uses less digits than its factorization.

397463220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 36.

The square root of 397463220 is about 19936.4796290619. The cubic root of 397463220 is about 735.2453991075.

The spelling of 397463220 in words is "three hundred ninety-seven million, four hundred sixty-three thousand, two hundred twenty".