17220940 has 24 divisors (see below), whose sum is σ = 39452112. Its totient is φ = 6262080.

The previous prime is 17220913. The next prime is 17220953. The reversal of 17220940 is 4902271.

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, 38919 + ... + 39358.

It is an arithmetic number, because the mean of its divisors is an integer number (1643838).

Almost surely, 2^17220940 is an apocalyptic number.

17220940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

17220940 is an abundant number, since it is smaller than the sum of its proper divisors (22231172).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

17220940 is a wasteful number, since it uses less digits than its factorization.

17220940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78297 (or 78295 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 17220940 is about 4149.8120439364. The cubic root of 17220940 is about 258.2372874542.

It can be divided in two parts, 172 and 20940, that added together give a palindrome (21112).

The spelling of 17220940 in words is "seventeen million, two hundred twenty thousand, nine hundred forty".