400808880880 has 80 divisors (see below), whose sum is σ = 939525295104. Its totient is φ = 159009177600.

The previous prime is 400808880827. The next prime is 400808880937. The reversal of 400808880880 is 88088808004.

It is a tau number, because it is divible by the number of its divisors (80).

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 15 ways as a sum of consecutive naturals, for example, 50724930 + ... + 50732830.

Almost surely, 2^400808880880 is an apocalyptic number.

400808880880 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 400808880880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (469762647552).

400808880880 is an abundant number, since it is smaller than the sum of its proper divisors (538716414224).

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

400808880880 is a wasteful number, since it uses less digits than its factorization.

400808880880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13034 (or 13028 counting only the distinct ones).

The product of its (nonzero) digits is 1048576, while the sum is 52.

The spelling of 400808880880 in words is "four hundred billion, eight hundred eight million, eight hundred eighty thousand, eight hundred eighty".