189208690 has 32 divisors (see below), whose sum is σ = 372682944. Its totient is φ = 68591040.

The previous prime is 189208687. The next prime is 189208697. The reversal of 189208690 is 96802981.

It is a happy number.

It is a super-2 number, since 2×189208690² = 71599856743032200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (189208697) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 35692 + ... + 40648.

It is an arithmetic number, because the mean of its divisors is an integer number (11646342).

Almost surely, 2^189208690 is an apocalyptic number.

189208690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189208690 is a deficient number, since it is larger than the sum of its proper divisors (183474254).

189208690 is a wasteful number, since it uses less digits than its factorization.

189208690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5322.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 189208690 is about 13755.3149727660. The cubic root of 189208690 is about 574.0904991521.

The spelling of 189208690 in words is "one hundred eighty-nine million, two hundred eight thousand, six hundred ninety".