17220872 has 16 divisors (see below), whose sum is σ = 33331200. Its totient is φ = 8332560.

The previous prime is 17220869. The next prime is 17220893. The reversal of 17220872 is 27802271.

It is a congruent number.

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, 34472 + ... + 34967.

It is an arithmetic number, because the mean of its divisors is an integer number (2083200).

Almost surely, 2^17220872 is an apocalyptic number.

It is an amenable number.

17220872 is a deficient number, since it is larger than the sum of its proper divisors (16110328).

17220872 is a wasteful number, since it uses less digits than its factorization.

17220872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69476 (or 69472 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 17220872 is about 4149.8038507862. The cubic root of 17220872 is about 258.2369475549.

The spelling of 17220872 in words is "seventeen million, two hundred twenty thousand, eight hundred seventy-two".