190020290 has 16 divisors (see below), whose sum is σ = 343776312. Its totient is φ = 75621504.

The previous prime is 190020277. The next prime is 190020301. The reversal of 190020290 is 92020091.

It can be written as a sum of positive squares in 4 ways, for example, as 189915961 + 104329 = 13781^2 + 323^2 .

It is a super-2 number, since 2×190020290² = 72215421223368200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46259 + ... + 50198.

Almost surely, 2^190020290 is an apocalyptic number.

190020290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

190020290 is a deficient number, since it is larger than the sum of its proper divisors (153756022).

190020290 is a wasteful number, since it uses less digits than its factorization.

190020290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96661.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 190020290 is about 13784.7847280979. The cubic root of 190020290 is about 574.9101712225.

The spelling of 190020290 in words is "one hundred ninety million, twenty thousand, two hundred ninety".