16981572 has 24 divisors (see below), whose sum is σ = 41954976. Its totient is φ = 5327488.

The previous prime is 16981553. The next prime is 16981577. The reversal of 16981572 is 27518961.

It is a self number, because there is not a number n which added to its sum of digits gives 16981572.

It is not an unprimeable number, because it can be changed into a prime (16981577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41418 + ... + 41825.

It is an arithmetic number, because the mean of its divisors is an integer number (1748124).

Almost surely, 2^16981572 is an apocalyptic number.

16981572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16981572 is an abundant number, since it is smaller than the sum of its proper divisors (24973404).

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

16981572 is a wasteful number, since it uses less digits than its factorization.

16981572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83267 (or 83265 counting only the distinct ones).

The product of its digits is 30240, while the sum is 39.

The square root of 16981572 is about 4120.8702964301. The cubic root of 16981572 is about 257.0352164997.

The spelling of 16981572 in words is "sixteen million, nine hundred eighty-one thousand, five hundred seventy-two".