28073172 has 36 divisors (see below), whose sum is σ = 66564960. Its totient is φ = 9208512.

The previous prime is 28073153. The next prime is 28073183. The reversal of 28073172 is 27137082.

It is a super-2 number, since 2×28073172² = 1576205972283168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 63729 + ... + 64167.

Almost surely, 2^28073172 is an apocalyptic number.

It is an amenable number.

28073172 is an abundant number, since it is smaller than the sum of its proper divisors (38491788).

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

28073172 is a wasteful number, since it uses less digits than its factorization.

28073172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592 (or 517 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 28073172 is about 5298.4122149942. The cubic root of 28073172 is about 303.9231829224.

The spelling of 28073172 in words is "twenty-eight million, seventy-three thousand, one hundred seventy-two".