8840400880 has 20 divisors (see below), whose sum is σ = 20553932232. Its totient is φ = 3536160320.

The previous prime is 8840400871. The next prime is 8840400887. The reversal of 8840400880 is 880040488.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8840400887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55252426 + ... + 55252585.

Almost surely, 2^8840400880 is an apocalyptic number.

8840400880 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8840400880 is an abundant number, since it is smaller than the sum of its proper divisors (11713531352).

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

8840400880 is a wasteful number, since it uses less digits than its factorization.

8840400880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110505024 (or 110505018 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 40.

The square root of 8840400880 is about 94023.4060221177. The cubic root of 8840400880 is about 2067.7148797492.

The spelling of 8840400880 in words is "eight billion, eight hundred forty million, four hundred thousand, eight hundred eighty".