189975744 has 252 divisors, whose sum is σ = 650467584. Its totient is φ = 52835328.

The previous prime is 189975733. The next prime is 189975769. The reversal of 189975744 is 447579981.

It is a tau number, because it is divible by the number of its divisors (252).

Its product of digits (2540160) is a multiple of the sum of its prime divisors (192).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1495809 + ... + 1495935.

Almost surely, 2^189975744 is an apocalyptic number.

189975744 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189975744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (325233792).

189975744 is an abundant number, since it is smaller than the sum of its proper divisors (460491840).

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

189975744 is a wasteful number, since it uses less digits than its factorization.

189975744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212 (or 192 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The square root of 189975744 is about 13783.1688664109. The cubic root of 189975744 is about 574.8652427748.

The spelling of 189975744 in words is "one hundred eighty-nine million, nine hundred seventy-five thousand, seven hundred forty-four".