17880972 has 12 divisors (see below), whose sum is σ = 41722296. Its totient is φ = 5960320.

The previous prime is 17880971. The next prime is 17880977. The reversal of 17880972 is 27908871.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (17880971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 745029 + ... + 745052.

It is an arithmetic number, because the mean of its divisors is an integer number (3476858).

Almost surely, 2^17880972 is an apocalyptic number.

17880972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

17880972 is an abundant number, since it is smaller than the sum of its proper divisors (23841324).

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

17880972 is a wasteful number, since it uses less digits than its factorization.

17880972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490088 (or 1490086 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 42.

The square root of 17880972 is about 4228.5898358673. The cubic root of 17880972 is about 261.4951917682.

The spelling of 17880972 in words is "seventeen million, eight hundred eighty thousand, nine hundred seventy-two".