399954532 has 6 divisors (see below), whose sum is σ = 699920438. Its totient is φ = 199977264.

The previous prime is 399954523. The next prime is 399954539. The reversal of 399954532 is 235459993.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 316341796 + 83612736 = 17786^2 + 9144^2 .

It is not an unprimeable number, because it can be changed into a prime (399954539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49994313 + ... + 49994320.

Almost surely, 2^399954532 is an apocalyptic number.

It is an amenable number.

399954532 is a deficient number, since it is larger than the sum of its proper divisors (299965906).

399954532 is a wasteful number, since it uses less digits than its factorization.

399954532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99988637 (or 99988635 counting only the distinct ones).

The product of its digits is 1312200, while the sum is 49.

The square root of 399954532 is about 19998.8632676960. The cubic root of 399954532 is about 736.7783810795.

The spelling of 399954532 in words is "three hundred ninety-nine million, nine hundred fifty-four thousand, five hundred thirty-two".