400544025 has 48 divisors (see below), whose sum is σ = 781283328. Its totient is φ = 177192000.

The previous prime is 400544017. The next prime is 400544029. The reversal of 400544025 is 520445004.

400544025 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 400544025 - 2³ = 400544017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400543986 and 400544004.

It is not an unprimeable number, because it can be changed into a prime (400544029) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3970 + ... + 28580.

It is an arithmetic number, because the mean of its divisors is an integer number (16276736).

Almost surely, 2^400544025 is an apocalyptic number.

It is an amenable number.

400544025 is a deficient number, since it is larger than the sum of its proper divisors (380739303).

400544025 is a wasteful number, since it uses less digits than its factorization.

400544025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24662 (or 24657 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 400544025 is about 20013.5960037171. The cubic root of 400544025 is about 737.1401826126.

Adding to 400544025 its reverse (520445004), we get a palindrome (920989029).

The spelling of 400544025 in words is "four hundred million, five hundred forty-four thousand, twenty-five".