1888800879978 has 12 divisors (see below), whose sum is σ = 4092401906658. Its totient is φ = 629600293320.

The previous prime is 1888800879943. The next prime is 1888800880051. The reversal of 1888800879978 is 8799780088881.

It can be written as a sum of positive squares in only one way, i.e., 1644336888489 + 244463991489 = 1282317^2 + 494433^2 .

It is a super-2 number, since 2×1888800879978² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1888800879897 and 1888800879906.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52466691093 + ... + 52466691128.

Almost surely, 2^{1888800879978} is an apocalyptic number.

1888800879978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1888800879978 is an abundant number, since it is smaller than the sum of its proper divisors (2203601026680).

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

1888800879978 is a wasteful number, since it uses less digits than its factorization.

1888800879978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104933382229 (or 104933382226 counting only the distinct ones).

The product of its (nonzero) digits is 1040449536, while the sum is 81.

The spelling of 1888800879978 in words is "one trillion, eight hundred eighty-eight billion, eight hundred million, eight hundred seventy-nine thousand, nine hundred seventy-eight".