399250925620 has 24 divisors (see below), whose sum is σ = 838796553000. Its totient is φ = 159629968512.

The previous prime is 399250925617. The next prime is 399250925629. The reversal of 399250925620 is 26529052993.

It can be written as a sum of positive squares in 4 ways, for example, as 60030880144 + 339220045476 = 245012^2 + 582426^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399250925629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4353595 + ... + 4444354.

It is an arithmetic number, because the mean of its divisors is an integer number (34949856375).

Almost surely, 2^399250925620 is an apocalyptic number.

It is an amenable number.

399250925620 is an abundant number, since it is smaller than the sum of its proper divisors (439545627380).

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

399250925620 is a wasteful number, since it uses less digits than its factorization.

399250925620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8800227 (or 8800225 counting only the distinct ones).

The product of its (nonzero) digits is 2624400, while the sum is 52.

The spelling of 399250925620 in words is "three hundred ninety-nine billion, two hundred fifty million, nine hundred twenty-five thousand, six hundred twenty".