189442810 has 16 divisors (see below), whose sum is σ = 341172000. Its totient is φ = 75738256.

The previous prime is 189442801. The next prime is 189442823. The reversal of 189442810 is 18244981.

It is a super-2 number, since 2×189442810² = 71777156521392200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 189442810.

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, 23481 + ... + 30499.

It is an arithmetic number, because the mean of its divisors is an integer number (21323250).

Almost surely, 2^189442810 is an apocalyptic number.

189442810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189442810 is a deficient number, since it is larger than the sum of its proper divisors (151729190).

189442810 is a wasteful number, since it uses less digits than its factorization.

189442810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9725.

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 189442810 is about 13763.8225068474. The cubic root of 189442810 is about 574.3271878393.

The spelling of 189442810 in words is "one hundred eighty-nine million, four hundred forty-two thousand, eight hundred ten".