188620940 has 24 divisors (see below), whose sum is σ = 396366432. Its totient is φ = 75398400.

The previous prime is 188620937. The next prime is 188620963. The reversal of 188620940 is 49026881.

It is a junction number, because it is equal to n+sod(n) for n = 188620894 and 188620903.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49172 + ... + 52868.

It is an arithmetic number, because the mean of its divisors is an integer number (16515268).

Almost surely, 2^188620940 is an apocalyptic number.

188620940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

188620940 is an abundant number, since it is smaller than the sum of its proper divisors (207745492).

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

188620940 is a wasteful number, since it uses less digits than its factorization.

188620940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6257 (or 6255 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 188620940 is about 13733.9338865454. The cubic root of 188620940 is about 573.4954389581.

The spelling of 188620940 in words is "one hundred eighty-eight million, six hundred twenty thousand, nine hundred forty".