16905972 has 24 divisors (see below), whose sum is σ = 41524000. Its totient is φ = 5338656.

The previous prime is 16905971. The next prime is 16906027. The reversal of 16905972 is 27950961.

It is a self number, because there is not a number n which added to its sum of digits gives 16905972.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16905971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36847 + ... + 37302.

Almost surely, 2^16905972 is an apocalyptic number.

16905972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16905972 is an abundant number, since it is smaller than the sum of its proper divisors (24618028).

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

16905972 is a wasteful number, since it uses less digits than its factorization.

16905972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74175 (or 74173 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 16905972 is about 4111.6872449154. The cubic root of 16905972 is about 256.6532186878.

The spelling of 16905972 in words is "sixteen million, nine hundred five thousand, nine hundred seventy-two".