189665274 has 16 divisors (see below), whose sum is σ = 383087520. Its totient is φ = 62595600.

The previous prime is 189665269. The next prime is 189665279. The reversal of 189665274 is 472566981.

It is an interprime number because it is at equal distance from previous prime (189665269) and next prime (189665279).

It is a super-2 number, since 2×189665274² = 71945832322990152, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (189665279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155884 + ... + 157095.

It is an arithmetic number, because the mean of its divisors is an integer number (23942970).

Almost surely, 2^189665274 is an apocalyptic number.

189665274 is an abundant number, since it is smaller than the sum of its proper divisors (193422246).

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

189665274 is a wasteful number, since it uses less digits than its factorization.

189665274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313085.

The product of its digits is 725760, while the sum is 48.

The square root of 189665274 is about 13771.9016116149. The cubic root of 189665274 is about 574.5519120248.

The spelling of 189665274 in words is "one hundred eighty-nine million, six hundred sixty-five thousand, two hundred seventy-four".