400440888 has 128 divisors (see below), whose sum is σ = 1164288000. Its totient is φ = 127370880.

The previous prime is 400440869. The next prime is 400440949. The reversal of 400440888 is 888044004.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 528606 + ... + 529362.

It is an arithmetic number, because the mean of its divisors is an integer number (9096000).

Almost surely, 2^400440888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400440888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (582144000).

400440888 is an abundant number, since it is smaller than the sum of its proper divisors (763847112).

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

400440888 is a wasteful number, since it uses less digits than its factorization.

400440888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882 (or 872 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 36.

The square root of 400440888 is about 20011.0191644504. The cubic root of 400440888 is about 737.0769078757.

The spelling of 400440888 in words is "four hundred million, four hundred forty thousand, eight hundred eighty-eight".