189589490 has 32 divisors (see below), whose sum is σ = 353203200. Its totient is φ = 73195200.

The previous prime is 189589487. The next prime is 189589511. The reversal of 189589490 is 94985981.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 185180 + ... + 186200.

It is an arithmetic number, because the mean of its divisors is an integer number (11037600).

Almost surely, 2^189589490 is an apocalyptic number.

189589490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189589490 is a deficient number, since it is larger than the sum of its proper divisors (163613710).

189589490 is a wasteful number, since it uses less digits than its factorization.

189589490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1658.

The product of its (nonzero) digits is 933120, while the sum is 53.

The square root of 189589490 is about 13769.1499374508. The cubic root of 189589490 is about 574.4753778201.

The spelling of 189589490 in words is "one hundred eighty-nine million, five hundred eighty-nine thousand, four hundred ninety".