400880088440 has 64 divisors (see below), whose sum is σ = 972273304800. Its totient is φ = 147878595072.

The previous prime is 400880088431. The next prime is 400880088463. The reversal of 400880088440 is 44880088004.

It is a junction number, because it is equal to n+sod(n) for n = 400880088391 and 400880088400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195299 + ... + 916461.

Almost surely, 2^400880088440 is an apocalyptic number.

400880088440 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 400880088440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (486136652400).

400880088440 is an abundant number, since it is smaller than the sum of its proper divisors (571393216360).

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

400880088440 is a wasteful number, since it uses less digits than its factorization.

400880088440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722256 (or 722252 counting only the distinct ones).

The product of its (nonzero) digits is 262144, while the sum is 44.

The spelling of 400880088440 in words is "four hundred billion, eight hundred eighty million, eighty-eight thousand, four hundred forty".