189956250 has 144 divisors (see below), whose sum is σ = 563026464. Its totient is φ = 45900000.

The previous prime is 189956237. The next prime is 189956297. The reversal of 189956250 is 52659981.

189956250 is a `hidden beast` number, since 1 + 89 + 9 + 562 + 5 + 0 = 666.

It is a Smith number, since the sum of its digits (45) 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 (45).

It is a junction number, because it is equal to n+sod(n) for n = 189956196 and 189956205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 618597 + ... + 618903.

It is an arithmetic number, because the mean of its divisors is an integer number (3909906).

Almost surely, 2^189956250 is an apocalyptic number.

189956250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 189956250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281513232).

189956250 is an abundant number, since it is smaller than the sum of its proper divisors (373070214).

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

189956250 is a wasteful number, since it uses less digits than its factorization.

189956250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The square root of 189956250 is about 13782.4616814269. The cubic root of 189956250 is about 574.8455792007.

The spelling of 189956250 in words is "one hundred eighty-nine million, nine hundred fifty-six thousand, two hundred fifty".