17920090 has 16 divisors (see below), whose sum is σ = 32306688. Its totient is φ = 7156816.

The previous prime is 17920087. The next prime is 17920093. The reversal of 17920090 is 9002971.

It is an interprime number because it is at equal distance from previous prime (17920087) and next prime (17920093).

It is a super-2 number, since 2×17920090² = 642259251216200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (17920093) 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, 8919 + ... + 10741.

It is an arithmetic number, because the mean of its divisors is an integer number (2019168).

Almost surely, 2^17920090 is an apocalyptic number.

17920090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

17920090 is a deficient number, since it is larger than the sum of its proper divisors (14386598).

17920090 is a wasteful number, since it uses less digits than its factorization.

17920090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2813.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 17920090 is about 4233.2127279408. The cubic root of 17920090 is about 261.6857429036.

The spelling of 17920090 in words is "seventeen million, nine hundred twenty thousand, ninety".