188421970 has 16 divisors (see below), whose sum is σ = 369992448. Its totient is φ = 68517040.

The previous prime is 188421967. The next prime is 188421977. The reversal of 188421970 is 79124881.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (188421977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 856354 + ... + 856573.

It is an arithmetic number, because the mean of its divisors is an integer number (23124528).

Almost surely, 2^188421970 is an apocalyptic number.

188421970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

188421970 is a deficient number, since it is larger than the sum of its proper divisors (181570478).

188421970 is a wasteful number, since it uses less digits than its factorization.

188421970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1712945.

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 188421970 is about 13726.6882386102. The cubic root of 188421970 is about 573.2937142114.

The spelling of 188421970 in words is "one hundred eighty-eight million, four hundred twenty-one thousand, nine hundred seventy".