189297490 has 16 divisors (see below), whose sum is σ = 341350848. Its totient is φ = 75582256.

The previous prime is 189297443. The next prime is 189297527. The reversal of 189297490 is 94792981.

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 7 ways as a sum of consecutive naturals, for example, 11182 + ... + 22441.

It is an arithmetic number, because the mean of its divisors is an integer number (21334428).

Almost surely, 2^189297490 is an apocalyptic number.

189297490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189297490 is a deficient number, since it is larger than the sum of its proper divisors (152053358).

189297490 is a wasteful number, since it uses less digits than its factorization.

189297490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34193.

The product of its (nonzero) digits is 326592, while the sum is 49.

The square root of 189297490 is about 13758.5424373369. The cubic root of 189297490 is about 574.1802964075.

The spelling of 189297490 in words is "one hundred eighty-nine million, two hundred ninety-seven thousand, four hundred ninety".