397449936858 has 32 divisors (see below), whose sum is σ = 856089815616. Its totient is φ = 122286031488.

The previous prime is 397449936847. The next prime is 397449936887. The reversal of 397449936858 is 858639944793.

It is a self number, because there is not a number n which added to its sum of digits gives 397449936858.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1540366 + ... + 1779782.

It is an arithmetic number, because the mean of its divisors is an integer number (26752806738).

Almost surely, 2^397449936858 is an apocalyptic number.

397449936858 is an abundant number, since it is smaller than the sum of its proper divisors (458639878758).

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

397449936858 is a wasteful number, since it uses less digits than its factorization.

397449936858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260718.

The product of its digits is 1410877440, while the sum is 75.

The spelling of 397449936858 in words is "three hundred ninety-seven billion, four hundred forty-nine million, nine hundred thirty-six thousand, eight hundred fifty-eight".