400452320 has 24 divisors (see below), whose sum is σ = 946068984. Its totient is φ = 160180864.

The previous prime is 400452317. The next prime is 400452331. The reversal of 400452320 is 23254004.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 400452292 and 400452301.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1251254 + ... + 1251573.

It is an arithmetic number, because the mean of its divisors is an integer number (39419541).

Almost surely, 2^400452320 is an apocalyptic number.

400452320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400452320 is an abundant number, since it is smaller than the sum of its proper divisors (545616664).

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

400452320 is a wasteful number, since it uses less digits than its factorization.

400452320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2502842 (or 2502834 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 400452320 is about 20011.3048050346. The cubic root of 400452320 is about 737.0839219639.

The spelling of 400452320 in words is "four hundred million, four hundred fifty-two thousand, three hundred twenty".