189490770 has 48 divisors (see below), whose sum is σ = 563060160. Its totient is φ = 43312032.

The previous prime is 189490757. The next prime is 189490783. The reversal of 189490770 is 77094981.

189490770 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (189490757) and next prime (189490783).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149760 + ... + 151019.

It is an arithmetic number, because the mean of its divisors is an integer number (11730420).

Almost surely, 2^189490770 is an apocalyptic number.

189490770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189490770 is an abundant number, since it is smaller than the sum of its proper divisors (373569390).

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

189490770 is a wasteful number, since it uses less digits than its factorization.

189490770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300799 (or 300796 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 189490770 is about 13765.5646451571. The cubic root of 189490770 is about 574.3756499721.

The spelling of 189490770 in words is "one hundred eighty-nine million, four hundred ninety thousand, seven hundred seventy".