400808925 has 96 divisors (see below), whose sum is σ = 838517760. Its totient is φ = 185803200.

The previous prime is 400808923. The next prime is 400808953. The reversal of 400808925 is 529808004.

It is not a de Polignac number, because 400808925 - 2¹ = 400808923 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400808925.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400808921) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 169602 + ... + 171948.

It is an arithmetic number, because the mean of its divisors is an integer number (8734560).

Almost surely, 2^400808925 is an apocalyptic number.

400808925 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

400808925 is an abundant number, since it is smaller than the sum of its proper divisors (437708835).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400808925 is a wasteful number, since it uses less digits than its factorization.

400808925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2400 (or 2389 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 400808925 is about 20020.2129109558. The cubic root of 400808925 is about 737.3026494835.

The spelling of 400808925 in words is "four hundred million, eight hundred eight thousand, nine hundred twenty-five".