397860387208 has 8 divisors (see below), whose sum is σ = 745988226030. Its totient is φ = 198930193600.

The previous prime is 397860387193. The next prime is 397860387217. The reversal of 397860387208 is 802783068793.

It can be written as a sum of positive squares in only one way, i.e., 396922680324 + 937706884 = 630018^2 + 30622^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24866274193 + ... + 24866274208.

Almost surely, 2^397860387208 is an apocalyptic number.

It is an amenable number.

397860387208 is a deficient number, since it is larger than the sum of its proper divisors (348127838822).

397860387208 is a wasteful number, since it uses less digits than its factorization.

397860387208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49732548407 (or 49732548403 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 61.

The spelling of 397860387208 in words is "three hundred ninety-seven billion, eight hundred sixty million, three hundred eighty-seven thousand, two hundred eight".