399533760 has 84 divisors (see below), whose sum is σ = 1374239568. Its totient is φ = 106541568.

The previous prime is 399533753. The next prime is 399533773. The reversal of 399533760 is 67335993.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66484 + ... + 72243.

Almost surely, 2^399533760 is an apocalyptic number.

399533760 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

399533760 is an abundant number, since it is smaller than the sum of its proper divisors (974705808).

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

399533760 is a wasteful number, since it uses less digits than its factorization.

399533760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138750 (or 138737 counting only the distinct ones).

The product of its (nonzero) digits is 459270, while the sum is 45.

The square root of 399533760 is about 19988.3406014606. The cubic root of 399533760 is about 736.5199146214.

The spelling of 399533760 in words is "three hundred ninety-nine million, five hundred thirty-three thousand, seven hundred sixty".