397311242528 has 18 divisors (see below), whose sum is σ = 782213528691. Its totient is φ = 198653838432.

The previous prime is 397311242501. The next prime is 397311242543. The reversal of 397311242528 is 825242113793.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 198655621264 + 198655621264 = 445708^2 + 445708^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=445708.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3509951 + ... + 3621377.

Almost surely, 2^397311242528 is an apocalyptic number.

It is an amenable number.

397311242528 is a deficient number, since it is larger than the sum of its proper divisors (384902286163).

397311242528 is an frugal number, since it uses more digits than its factorization.

397311242528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222864 (or 111429 counting only the distinct ones).

The product of its digits is 725760, while the sum is 47.

The spelling of 397311242528 in words is "three hundred ninety-seven billion, three hundred eleven million, two hundred forty-two thousand, five hundred twenty-eight".