189700090 has 32 divisors (see below), whose sum is σ = 364611456. Its totient is φ = 70889280.

The previous prime is 189700061. The next prime is 189700099. The reversal of 189700090 is 90007981.

It is a super-2 number, since 2×189700090² = 71972248292016200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (189700099) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 300 + ... + 19480.

It is an arithmetic number, because the mean of its divisors is an integer number (11394108).

Almost surely, 2^189700090 is an apocalyptic number.

189700090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189700090 is a deficient number, since it is larger than the sum of its proper divisors (174911366).

189700090 is a wasteful number, since it uses less digits than its factorization.

189700090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19254.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 189700090 is about 13773.1655765841. The cubic root of 189700090 is about 574.5870658427.

The spelling of 189700090 in words is "one hundred eighty-nine million, seven hundred thousand, ninety".