28251672 has 16 divisors (see below), whose sum is σ = 70629240. Its totient is φ = 9417216.

The previous prime is 28251631. The next prime is 28251673. The reversal of 28251672 is 27615282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28251673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 588553 + ... + 588600.

Almost surely, 2^28251672 is an apocalyptic number.

It is an amenable number.

28251672 is an abundant number, since it is smaller than the sum of its proper divisors (42377568).

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

28251672 is a wasteful number, since it uses less digits than its factorization.

28251672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177162 (or 1177158 counting only the distinct ones).

The product of its digits is 13440, while the sum is 33.

The square root of 28251672 is about 5315.2301925693. The cubic root of 28251672 is about 304.5659758734.

The spelling of 28251672 in words is "twenty-eight million, two hundred fifty-one thousand, six hundred seventy-two".