189039792 has 20 divisors (see below), whose sum is σ = 488352920. Its totient is φ = 63013248.

The previous prime is 189039787. The next prime is 189039841. The reversal of 189039792 is 297930981.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 3938329 = 189039792 / (1 + 8 + 9 + 0 + 3 + 9 + 7 + 9 + 2).

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, 1969117 + ... + 1969212.

It is an arithmetic number, because the mean of its divisors is an integer number (24417646).

Almost surely, 2^189039792 is an apocalyptic number.

189039792 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

189039792 is an abundant number, since it is smaller than the sum of its proper divisors (299313128).

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

189039792 is a wasteful number, since it uses less digits than its factorization.

189039792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3938340 (or 3938334 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 48.

The square root of 189039792 is about 13749.1742297492. The cubic root of 189039792 is about 573.9196267980.

The spelling of 189039792 in words is "one hundred eighty-nine million, thirty-nine thousand, seven hundred ninety-two".