189902952 has 24 divisors (see below), whose sum is σ = 514320690. Its totient is φ = 63300960.

The previous prime is 189902917. The next prime is 189902953. The reversal of 189902952 is 259209981.

It can be written as a sum of positive squares in only one way, i.e., 135349956 + 54552996 = 11634^2 + 7386^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 189902898 and 189902907.

It is not an unprimeable number, because it can be changed into a prime (189902953) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1318699 + ... + 1318842.

Almost surely, 2^189902952 is an apocalyptic number.

189902952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

189902952 is an abundant number, since it is smaller than the sum of its proper divisors (324417738).

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

189902952 is a wasteful number, since it uses less digits than its factorization.

189902952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2637553 (or 2637546 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 189902952 is about 13780.5280014954. The cubic root of 189902952 is about 574.7918107047.

The spelling of 189902952 in words is "one hundred eighty-nine million, nine hundred two thousand, nine hundred fifty-two".