400025925 has 48 divisors (see below), whose sum is σ = 791407680. Its totient is φ = 196931520.

The previous prime is 400025921. The next prime is 400025939. The reversal of 400025925 is 529520004.

400025925 is a `hidden beast` number, since 400 + 0 + 259 + 2 + 5 = 666.

It is not a de Polignac number, because 400025925 - 2² = 400025921 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400025921) 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, 14019 + ... + 31568.

It is an arithmetic number, because the mean of its divisors is an integer number (16487660).

Almost surely, 2^400025925 is an apocalyptic number.

400025925 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

400025925 is a deficient number, since it is larger than the sum of its proper divisors (391381755).

400025925 is a wasteful number, since it uses less digits than its factorization.

400025925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45619 (or 45608 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 400025925 is about 20000.6481144987. The cubic root of 400025925 is about 736.8222174703.

Adding to 400025925 its reverse (529520004), we get a palindrome (929545929).

The spelling of 400025925 in words is "four hundred million, twenty-five thousand, nine hundred twenty-five".