190000090 has 16 divisors (see below), whose sum is σ = 390857472. Its totient is φ = 65142864.

The previous prime is 190000067. The next prime is 190000091. The reversal of 190000090 is 90000091.

It is a super-2 number, since 2×190000090² = 72200068400016200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (190000091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1357074 + ... + 1357213.

It is an arithmetic number, because the mean of its divisors is an integer number (24428592).

Almost surely, 2^190000090 is an apocalyptic number.

190000090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

190000090 is an abundant number, since it is smaller than the sum of its proper divisors (200857382).

190000090 is a wasteful number, since it uses less digits than its factorization.

190000090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2714301.

The product of its (nonzero) digits is 81, while the sum is 19.

The square root of 190000090 is about 13784.0520167330. The cubic root of 190000090 is about 574.8897986665.

Subtracting from 190000090 its reverse (90000091), we obtain a palindrome (99999999).

The spelling of 190000090 in words is "one hundred ninety million, ninety", and thus it is an aban number.