188899970 has 16 divisors (see below), whose sum is σ = 388594368. Its totient is φ = 64765680.

The previous prime is 188899969. The next prime is 188899987. The reversal of 188899970 is 79998881.

It is a Curzon number.

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, 1349216 + ... + 1349355.

It is an arithmetic number, because the mean of its divisors is an integer number (24287148).

Almost surely, 2^188899970 is an apocalyptic number.

188899970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

188899970 is an abundant number, since it is smaller than the sum of its proper divisors (199694398).

188899970 is a wasteful number, since it uses less digits than its factorization.

188899970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2698585.

The product of its (nonzero) digits is 2612736, while the sum is 59.

The square root of 188899970 is about 13744.0885474447. The cubic root of 188899970 is about 573.7780933110.

It can be divided in two parts, 18 and 8899970, that added together give a palindrome (8899988).

The spelling of 188899970 in words is "one hundred eighty-eight million, eight hundred ninety-nine thousand, nine hundred seventy".