16653972 has 24 divisors (see below), whose sum is σ = 38928736. Its totient is φ = 5541408.

The previous prime is 16653961. The next prime is 16653977. The reversal of 16653972 is 27935661.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 16653972.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16653977) 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, 9423 + ... + 11049.

Almost surely, 2^16653972 is an apocalyptic number.

16653972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16653972 is an abundant number, since it is smaller than the sum of its proper divisors (22274764).

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

16653972 is a wasteful number, since it uses less digits than its factorization.

16653972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2487 (or 2485 counting only the distinct ones).

The product of its digits is 68040, while the sum is 39.

The square root of 16653972 is about 4080.9278356766. The cubic root of 16653972 is about 255.3716073729.

The spelling of 16653972 in words is "sixteen million, six hundred fifty-three thousand, nine hundred seventy-two".