188120940 has 48 divisors (see below), whose sum is σ = 601988352. Its totient is φ = 42998976.

The previous prime is 188120923. The next prime is 188120953. The reversal of 188120940 is 49021881.

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, 223534 + ... + 224373.

It is an arithmetic number, because the mean of its divisors is an integer number (12541424).

Almost surely, 2^188120940 is an apocalyptic number.

188120940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

188120940 is an abundant number, since it is smaller than the sum of its proper divisors (413867412).

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

188120940 is a wasteful number, since it uses less digits than its factorization.

188120940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447926 (or 447924 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 188120940 is about 13715.7187197755. The cubic root of 188120940 is about 572.9882463043.

The spelling of 188120940 in words is "one hundred eighty-eight million, one hundred twenty thousand, nine hundred forty".