399046525 has 24 divisors (see below), whose sum is σ = 542007720. Its totient is φ = 290088960.

The previous prime is 399046523. The next prime is 399046547. The reversal of 399046525 is 525640993.

It can be written as a sum of positive squares in 12 ways, for example, as 34503876 + 364542649 = 5874^2 + 19093^2 .

It is not a de Polignac number, because 399046525 - 2¹ = 399046523 is a prime.

It is a super-2 number, since 2×399046525² = 318476258229151250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399046523) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3864 + ... + 28513.

It is an arithmetic number, because the mean of its divisors is an integer number (22583655).

Almost surely, 2^399046525 is an apocalyptic number.

It is an amenable number.

399046525 is a deficient number, since it is larger than the sum of its proper divisors (142961195).

399046525 is a wasteful number, since it uses less digits than its factorization.

399046525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32433 (or 32428 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 43.

The square root of 399046525 is about 19976.1489031295. The cubic root of 399046525 is about 736.2203952880.

The spelling of 399046525 in words is "three hundred ninety-nine million, forty-six thousand, five hundred twenty-five".