189390270 has 16 divisors (see below), whose sum is σ = 454536720. Its totient is φ = 50504064.

The previous prime is 189390259. The next prime is 189390281. The reversal of 189390270 is 72093981.

It is an interprime number because it is at equal distance from previous prime (189390259) and next prime (189390281).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3156475 + ... + 3156534.

It is an arithmetic number, because the mean of its divisors is an integer number (28408545).

Almost surely, 2^189390270 is an apocalyptic number.

189390270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189390270 is an abundant number, since it is smaller than the sum of its proper divisors (265146450).

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

189390270 is a wasteful number, since it uses less digits than its factorization.

189390270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6313019.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 189390270 is about 13761.9137477315. The cubic root of 189390270 is about 574.2740883657.

The spelling of 189390270 in words is "one hundred eighty-nine million, three hundred ninety thousand, two hundred seventy".