400528800 has 360 divisors, whose sum is σ = 1671205536. Its totient is φ = 91445760.

The previous prime is 400528781. The next prime is 400528801. The reversal of 400528800 is 8825004.

It is a tau number, because it is divible by the number of its divisors (360).

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

It is not an unprimeable number, because it can be changed into a prime (400528801) by changing a digit.

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 59 ways as a sum of consecutive naturals, for example, 453159 + ... + 454041.

Almost surely, 2^400528800 is an apocalyptic number.

400528800 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400528800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (835602768).

400528800 is an abundant number, since it is smaller than the sum of its proper divisors (1270676736).

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

400528800 is a wasteful number, since it uses less digits than its factorization.

400528800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922 (or 900 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 400528800 is about 20013.2156336757. The cubic root of 400528800 is about 737.1308427309.

The spelling of 400528800 in words is "four hundred million, five hundred twenty-eight thousand, eight hundred".