399164532 has 24 divisors (see below), whose sum is σ = 1003029216. Its totient is φ = 122819808.

The previous prime is 399164503. The next prime is 399164533. The reversal of 399164532 is 235461993.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399164533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1279218 + ... + 1279529.

It is an arithmetic number, because the mean of its divisors is an integer number (41792884).

Almost surely, 2^399164532 is an apocalyptic number.

It is an amenable number.

399164532 is an abundant number, since it is smaller than the sum of its proper divisors (603864684).

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

399164532 is a wasteful number, since it uses less digits than its factorization.

399164532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2558767 (or 2558765 counting only the distinct ones).

The product of its digits is 174960, while the sum is 42.

The square root of 399164532 is about 19979.1023822393. The cubic root of 399164532 is about 736.2929604252.

The spelling of 399164532 in words is "three hundred ninety-nine million, one hundred sixty-four thousand, five hundred thirty-two".