399896532 has 36 divisors (see below), whose sum is σ = 1155257376. Its totient is φ = 114256080.

The previous prime is 399896531. The next prime is 399896537. The reversal of 399896532 is 235698993.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399896531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 793194 + ... + 793697.

Almost surely, 2^399896532 is an apocalyptic number.

It is an amenable number.

399896532 is an abundant number, since it is smaller than the sum of its proper divisors (755360844).

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

399896532 is a wasteful number, since it uses less digits than its factorization.

399896532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1586908 (or 1586903 counting only the distinct ones).

The product of its digits is 3149280, while the sum is 54.

The square root of 399896532 is about 19997.4131327029. The cubic root of 399896532 is about 736.7427643543.

The spelling of 399896532 in words is "three hundred ninety-nine million, eight hundred ninety-six thousand, five hundred thirty-two".