188000988990 has 32 divisors (see below), whose sum is σ = 451246684320. Its totient is φ = 50128673664.

The previous prime is 188000988979. The next prime is 188000988991. The reversal of 188000988990 is 99889000881.

It is a super-2 number, since 2×188000988990² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188000988991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8176 + ... + 613244.

It is an arithmetic number, because the mean of its divisors is an integer number (14101458885).

Almost surely, 2^188000988990 is an apocalyptic number.

188000988990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

188000988990 is an abundant number, since it is smaller than the sum of its proper divisors (263245695330).

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

188000988990 is a wasteful number, since it uses less digits than its factorization.

188000988990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615436.

The product of its (nonzero) digits is 2985984, while the sum is 60.

The spelling of 188000988990 in words is "one hundred eighty-eight billion, nine hundred eighty-eight thousand, nine hundred ninety".