399257263400 has 24 divisors (see below), whose sum is σ = 928273137870. Its totient is φ = 159702905280.

The previous prime is 399257263393. The next prime is 399257263403. The reversal of 399257263400 is 4362752993.

It can be written as a sum of positive squares in 3 ways, for example, as 370148126404 + 29109136996 = 608398^2 + 170614^2 .

It is a Harshad number since it is a multiple of its sum of digits (50).

It is not an unprimeable number, because it can be changed into a prime (399257263403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 998142959 + ... + 998143358.

Almost surely, 2^399257263400 is an apocalyptic number.

It is an amenable number.

399257263400 is an abundant number, since it is smaller than the sum of its proper divisors (529015874470).

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

399257263400 is a wasteful number, since it uses less digits than its factorization.

399257263400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1996286333 (or 1996286324 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 50.

The spelling of 399257263400 in words is "three hundred ninety-nine billion, two hundred fifty-seven million, two hundred sixty-three thousand, four hundred".