400525004 has 36 divisors (see below), whose sum is σ = 772230984. Its totient is φ = 181632000.

The previous prime is 400524989. The next prime is 400525007.

It is a happy number.

400525004 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (400525007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 309599 + ... + 310889.

Almost surely, 2^400525004 is an apocalyptic number.

400525004 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

400525004 is a deficient number, since it is larger than the sum of its proper divisors (371705980).

400525004 is a wasteful number, since it uses less digits than its factorization.

400525004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1958 (or 1945 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 400525004 is about 20013.1207961177. The cubic root of 400525004 is about 737.1285140115.

The spelling of 400525004 in words is "four hundred million, five hundred twenty-five thousand, four".