17990225 has 12 divisors (see below), whose sum is σ = 24336240. Its totient is φ = 13083600.

The previous prime is 17990213. The next prime is 17990227. The reversal of 17990225 is 52209971.

It is a de Polignac number, because none of the positive numbers 2^k-17990225 is a prime.

It is not an unprimeable number, because it can be changed into a prime (17990227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32435 + ... + 32984.

It is an arithmetic number, because the mean of its divisors is an integer number (2028020).

Almost surely, 2^17990225 is an apocalyptic number.

It is an amenable number.

17990225 is a deficient number, since it is larger than the sum of its proper divisors (6346015).

17990225 is a wasteful number, since it uses less digits than its factorization.

17990225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65440 (or 65435 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 17990225 is about 4241.4885358798. The cubic root of 17990225 is about 262.0266905583.

The spelling of 17990225 in words is "seventeen million, nine hundred ninety thousand, two hundred twenty-five".