23172290 has 8 divisors (see below), whose sum is σ = 41710140. Its totient is φ = 9268912.

The previous prime is 23172287. The next prime is 23172301. The reversal of 23172290 is 9227132.

It can be written as a sum of positive squares in 2 ways, for example, as 23145721 + 26569 = 4811^2 + 163^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1158605 + ... + 1158624.

Almost surely, 2^23172290 is an apocalyptic number.

23172290 is a deficient number, since it is larger than the sum of its proper divisors (18537850).

23172290 is a wasteful number, since it uses less digits than its factorization.

23172290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2317236.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 23172290 is about 4813.7604842784. The cubic root of 23172290 is about 285.0950334558.

The spelling of 23172290 in words is "twenty-three million, one hundred seventy-two thousand, two hundred ninety".