28356672 has 56 divisors (see below), whose sum is σ = 75748896. Its totient is φ = 9361408.

The previous prime is 28356649. The next prime is 28356719. The reversal of 28356672 is 27665382.

It is a self number, because there is not a number n which added to its sum of digits gives 28356672.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21043 + ... + 22349.

Almost surely, 2^28356672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28356672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37874448).

28356672 is an abundant number, since it is smaller than the sum of its proper divisors (47392224).

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

28356672 is a wasteful number, since it uses less digits than its factorization.

28356672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1435 (or 1425 counting only the distinct ones).

The product of its digits is 120960, while the sum is 39.

The square root of 28356672 is about 5325.0983089517. The cubic root of 28356672 is about 304.9428254380.

The spelling of 28356672 in words is "twenty-eight million, three hundred fifty-six thousand, six hundred seventy-two".