397818882 has 12 divisors (see below), whose sum is σ = 861940950. Its totient is φ = 132606288.

The previous prime is 397818871. The next prime is 397818899. The reversal of 397818882 is 288818793.

It can be written as a sum of positive squares in only one way, i.e., 391208841 + 6610041 = 19779^2 + 2571^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11050507 + ... + 11050542.

Almost surely, 2^397818882 is an apocalyptic number.

397818882 is an abundant number, since it is smaller than the sum of its proper divisors (464122068).

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

397818882 is a wasteful number, since it uses less digits than its factorization.

397818882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22101057 (or 22101054 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 54.

The square root of 397818882 is about 19945.3975142136. The cubic root of 397818882 is about 735.4646402647.

The spelling of 397818882 in words is "three hundred ninety-seven million, eight hundred eighteen thousand, eight hundred eighty-two".