189965250 has 192 divisors, whose sum is σ = 551940480. Its totient is φ = 48859200.

The previous prime is 189965239. The next prime is 189965267. The reversal of 189965250 is 52569981.

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 = 189965196 and 189965205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3219721 + ... + 3219779.

It is an arithmetic number, because the mean of its divisors is an integer number (2874690).

Almost surely, 2^189965250 is an apocalyptic number.

189965250 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 189965250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275970240).

189965250 is an abundant number, since it is smaller than the sum of its proper divisors (361975230).

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

189965250 is an equidigital number, since it uses as much as digits as its factorization.

189965250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144 (or 122 counting only the distinct ones).

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

The square root of 189965250 is about 13782.7881794650. The cubic root of 189965250 is about 574.8546576569.

The spelling of 189965250 in words is "one hundred eighty-nine million, nine hundred sixty-five thousand, two hundred fifty".