397213293636 has 96 divisors (see below), whose sum is σ = 1040786718720. Its totient is φ = 131000740128.

The previous prime is 397213293629. The next prime is 397213293667. The reversal of 397213293636 is 636392312793.

397213293636 is a `hidden beast` number, since 397 + 2 + 132 + 93 + 6 + 36 = 666.

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 31 ways as a sum of consecutive naturals, for example, 3875101 + ... + 3976283.

It is an arithmetic number, because the mean of its divisors is an integer number (10841528320).

Almost surely, 2^397213293636 is an apocalyptic number.

397213293636 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 397213293636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (520393359360).

397213293636 is an abundant number, since it is smaller than the sum of its proper divisors (643573425084).

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

397213293636 is a wasteful number, since it uses less digits than its factorization.

397213293636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101582 (or 101574 counting only the distinct ones).

The product of its digits is 6613488, while the sum is 54.

The spelling of 397213293636 in words is "three hundred ninety-seven billion, two hundred thirteen million, two hundred ninety-three thousand, six hundred thirty-six".