189958770 has 80 divisors (see below), whose sum is σ = 537704640. Its totient is φ = 47985696.

The previous prime is 189958757. The next prime is 189958801. The reversal of 189958770 is 77859981.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 39 ways as a sum of consecutive naturals, for example, 9219 + ... + 21561.

It is an arithmetic number, because the mean of its divisors is an integer number (6721308).

Almost surely, 2^189958770 is an apocalyptic number.

189958770 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 189958770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268852320).

189958770 is an abundant number, since it is smaller than the sum of its proper divisors (347745870).

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

189958770 is a wasteful number, since it uses less digits than its factorization.

189958770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12381 (or 12372 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 54.

The square root of 189958770 is about 13782.5531016572. The cubic root of 189958770 is about 574.8481211974.

The spelling of 189958770 in words is "one hundred eighty-nine million, nine hundred fifty-eight thousand, seven hundred seventy".