189855812 has 6 divisors (see below), whose sum is σ = 332247678. Its totient is φ = 94927904.

The previous prime is 189855767. The next prime is 189855817. The reversal of 189855812 is 218558981.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 176996416 + 12859396 = 13304^2 + 3586^2 .

It is not an unprimeable number, because it can be changed into a prime (189855817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23731973 + ... + 23731980.

It is an arithmetic number, because the mean of its divisors is an integer number (55374613).

Almost surely, 2^189855812 is an apocalyptic number.

It is an amenable number.

189855812 is a deficient number, since it is larger than the sum of its proper divisors (142391866).

189855812 is a wasteful number, since it uses less digits than its factorization.

189855812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47463957 (or 47463955 counting only the distinct ones).

The product of its digits is 230400, while the sum is 47.

The square root of 189855812 is about 13778.8175109477. The cubic root of 189855812 is about 574.7442461847.

The spelling of 189855812 in words is "one hundred eighty-nine million, eight hundred fifty-five thousand, eight hundred twelve".