189906970 has 32 divisors (see below), whose sum is σ = 373476096. Its totient is φ = 68952000.

The previous prime is 189906953. The next prime is 189906973. The reversal of 189906970 is 79609981.

It is not an unprimeable number, because it can be changed into a prime (189906973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142447 + ... + 143773.

It is an arithmetic number, because the mean of its divisors is an integer number (11671128).

Almost surely, 2^189906970 is an apocalyptic number.

189906970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189906970 is a deficient number, since it is larger than the sum of its proper divisors (183569126).

189906970 is a wasteful number, since it uses less digits than its factorization.

189906970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2646.

The product of its (nonzero) digits is 244944, while the sum is 49.

The square root of 189906970 is about 13780.6737861398. The cubic root of 189906970 is about 574.7958645248.

The spelling of 189906970 in words is "one hundred eighty-nine million, nine hundred six thousand, nine hundred seventy".