88400008404 has 18 divisors (see below), whose sum is σ = 223455576890. Its totient is φ = 29466669456.

The previous prime is 88400008373. The next prime is 88400008451. The reversal of 88400008404 is 40480000488.

It can be written as a sum of positive squares in only one way, i.e., 82657400004 + 5742608400 = 287502^2 + 75780^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×88400008404² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2455555789 = 88400008404 / (8 + 8 + 4 + 0 + 0 + 0 + 0 + 8 + 4 + 0 + 4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1227777859 + ... + 1227777930.

Almost surely, 2^88400008404 is an apocalyptic number.

It is an amenable number.

88400008404 is an abundant number, since it is smaller than the sum of its proper divisors (135055568486).

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

88400008404 is a wasteful number, since it uses less digits than its factorization.

88400008404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2455555799 (or 2455555794 counting only the distinct ones).

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

The spelling of 88400008404 in words is "eighty-eight billion, four hundred million, eight thousand, four hundred four".