400692025 has 6 divisors (see below), whose sum is σ = 496858142. Its totient is φ = 320553600.

The previous prime is 400692013. The next prime is 400692049. The reversal of 400692025 is 520296004.

It can be written as a sum of positive squares in 3 ways, for example, as 108555561 + 292136464 = 10419^2 + 17092^2 .

It is not a de Polignac number, because 400692025 - 2⁷ = 400691897 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400691984 and 400692002.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8013816 + ... + 8013865.

Almost surely, 2^400692025 is an apocalyptic number.

It is an amenable number.

400692025 is a deficient number, since it is larger than the sum of its proper divisors (96166117).

400692025 is a wasteful number, since it uses less digits than its factorization.

400692025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16027691 (or 16027686 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 400692025 is about 20017.2931486752. The cubic root of 400692025 is about 737.2309619078.

The spelling of 400692025 in words is "four hundred million, six hundred ninety-two thousand, twenty-five".