189770850 has 72 divisors (see below), whose sum is σ = 528768240. Its totient is φ = 50602320.

The previous prime is 189770843. The next prime is 189770857. The reversal of 189770850 is 58077981.

It is an interprime number because it is at equal distance from previous prime (189770843) and next prime (189770857).

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 = 189770796 and 189770805.

It is not an unprimeable number, because it can be changed into a prime (189770857) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4341 + ... + 19959.

Almost surely, 2^189770850 is an apocalyptic number.

189770850 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 189770850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264384120).

189770850 is an abundant number, since it is smaller than the sum of its proper divisors (338997390).

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

189770850 is a wasteful number, since it uses less digits than its factorization.

189770850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15646 (or 15629 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The square root of 189770850 is about 13775.7341002213. The cubic root of 189770850 is about 574.6584991712.

The spelling of 189770850 in words is "one hundred eighty-nine million, seven hundred seventy thousand, eight hundred fifty".