188000520990 has 32 divisors (see below), whose sum is σ = 451430080416. Its totient is φ = 50108046720.

The previous prime is 188000520979. The next prime is 188000521003. The reversal of 188000520990 is 99025000881.

It is a happy number.

It is a super-2 number, since 2×188000520990² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1528921 + ... + 1647300.

It is an arithmetic number, because the mean of its divisors is an integer number (14107190013).

Almost surely, 2^188000520990 is an apocalyptic number.

188000520990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

188000520990 is an abundant number, since it is smaller than the sum of its proper divisors (263429559426).

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

188000520990 is a wasteful number, since it uses less digits than its factorization.

188000520990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3178204.

The product of its (nonzero) digits is 51840, while the sum is 42.

The spelling of 188000520990 in words is "one hundred eighty-eight billion, five hundred twenty thousand, nine hundred ninety".