397943374770 has 160 divisors (see below), whose sum is σ = 1160603213616. Its totient is φ = 97439846400.

The previous prime is 397943374739. The next prime is 397943374837. The reversal of 397943374770 is 77473349793.

397943374770 is a `hidden beast` number, since 3 + 97 + 9 + 43 + 37 + 477 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 160898056641 + 237045318129 = 401121^2 + 486873^2 .

It is a junction number, because it is equal to n+sod(n) for n = 397943374698 and 397943374707.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 212140 + ... + 917000.

Almost surely, 2^397943374770 is an apocalyptic number.

397943374770 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 397943374770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (580301606808).

397943374770 is an abundant number, since it is smaller than the sum of its proper divisors (762659838846).

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

397943374770 is a wasteful number, since it uses less digits than its factorization.

397943374770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704938 (or 704929 counting only the distinct ones).

The product of its (nonzero) digits is 84015792, while the sum is 63.

The spelling of 397943374770 in words is "three hundred ninety-seven billion, nine hundred forty-three million, three hundred seventy-four thousand, seven hundred seventy".