399394026893410 has 16 divisors (see below), whose sum is σ = 718922326894776. Its totient is φ = 159754704427008.

The previous prime is 399394026893371. The next prime is 399394026893441. The reversal of 399394026893410 is 14398620493993.

It can be written as a sum of positive squares in 4 ways, for example, as 301252570243641 + 98141456649769 = 17356629^2 + 9906637^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 399394026893410.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 362714079 + ... + 363813538.

Almost surely, 2^{399394026893410} is an apocalyptic number.

399394026893410 is a deficient number, since it is larger than the sum of its proper divisors (319528300001366).

399394026893410 is a wasteful number, since it uses less digits than its factorization.

399394026893410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726582597.

The product of its (nonzero) digits is 272097792, while the sum is 70.

The spelling of 399394026893410 in words is "three hundred ninety-nine trillion, three hundred ninety-four billion, twenty-six million, eight hundred ninety-three thousand, four hundred ten".