399551496 has 16 divisors (see below), whose sum is σ = 998878800. Its totient is φ = 133183824.

The previous prime is 399551491. The next prime is 399551507. The reversal of 399551496 is 694155993.

It is not an unprimeable number, because it can be changed into a prime (399551491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8323966 + ... + 8324013.

It is an arithmetic number, because the mean of its divisors is an integer number (62429925).

Almost surely, 2^399551496 is an apocalyptic number.

It is an amenable number.

399551496 is an abundant number, since it is smaller than the sum of its proper divisors (599327304).

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

399551496 is a wasteful number, since it uses less digits than its factorization.

399551496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16647988 (or 16647984 counting only the distinct ones).

The product of its digits is 1312200, while the sum is 51.

The square root of 399551496 is about 19988.7842551767. The cubic root of 399551496 is about 736.5308129278.

The spelling of 399551496 in words is "three hundred ninety-nine million, five hundred fifty-one thousand, four hundred ninety-six".