189749052 has 18 divisors (see below), whose sum is σ = 479643528. Its totient is φ = 63249672.

The previous prime is 189749041. The next prime is 189749069. The reversal of 189749052 is 250947981.

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 189748989 and 189749007.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2635368 + ... + 2635439.

Almost surely, 2^189749052 is an apocalyptic number.

189749052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

189749052 is an abundant number, since it is smaller than the sum of its proper divisors (289894476).

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

189749052 is a wasteful number, since it uses less digits than its factorization.

189749052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5270817 (or 5270812 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 189749052 is about 13774.9429036929. The cubic root of 189749052 is about 574.6364956415.

The spelling of 189749052 in words is "one hundred eighty-nine million, seven hundred forty-nine thousand, fifty-two".