397262776320 has 624 divisors, whose sum is σ = 1449382186980. Its totient is φ = 104485552128.

The previous prime is 397262776307. The next prime is 397262776357. The reversal of 397262776320 is 23677262793.

397262776320 is a `hidden beast` number, since 3 + 9 + 7 + 2 + 627 + 7 + 6 + 3 + 2 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 396718580736 + 544195584 = 629856^2 + 23328^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 51 ways as a sum of consecutive naturals, for example, 5441955804 + ... + 5441955876.

Almost surely, 2^397262776320 is an apocalyptic number.

397262776320 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 397262776320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (724691093490).

397262776320 is an abundant number, since it is smaller than the sum of its proper divisors (1052119410660).

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

397262776320 is an frugal number, since it uses more digits than its factorization.

397262776320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 8001504, while the sum is 54.

The spelling of 397262776320 in words is "three hundred ninety-seven billion, two hundred sixty-two million, seven hundred seventy-six thousand, three hundred twenty".