397980351684 has 36 divisors (see below), whose sum is σ = 1010215140480. Its totient is φ = 132105051120.

The previous prime is 397980351661. The next prime is 397980351689. The reversal of 397980351684 is 486153089793.

397980351684 is a `hidden beast` number, since 39 + 7 + 9 + 8 + 0 + 3 + 516 + 84 = 666.

397980351684 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (397980351689) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23119032 + ... + 23136239.

It is an arithmetic number, because the mean of its divisors is an integer number (28061531680).

Almost surely, 2^397980351684 is an apocalyptic number.

It is an amenable number.

397980351684 is an abundant number, since it is smaller than the sum of its proper divisors (612234788796).

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

397980351684 is a wasteful number, since it uses less digits than its factorization.

397980351684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46255520 (or 46255515 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 63.

The spelling of 397980351684 in words is "three hundred ninety-seven billion, nine hundred eighty million, three hundred fifty-one thousand, six hundred eighty-four".