189105812 has 12 divisors (see below), whose sum is σ = 378211680. Its totient is φ = 81045336.

The previous prime is 189105799. The next prime is 189105821. The reversal of 189105812 is 218501981.

189105812 is an admirable number.

It is a super-2 number, since 2×189105812² = 71522016264358688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3376862 + ... + 3376917.

It is an arithmetic number, because the mean of its divisors is an integer number (31517640).

Almost surely, 2^189105812 is an apocalyptic number.

It is an amenable number.

189105812 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

189105812 is a wasteful number, since it uses less digits than its factorization.

189105812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6753790 (or 6753788 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 35.

The square root of 189105812 is about 13751.5748916260. The cubic root of 189105812 is about 573.9864306585.

The spelling of 189105812 in words is "one hundred eighty-nine million, one hundred five thousand, eight hundred twelve".