28812672 has 160 divisors (see below), whose sum is σ = 98242320. Its totient is φ = 8211456.

The previous prime is 28812659. The next prime is 28812673. The reversal of 28812672 is 27621882.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28812673) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 72378 + ... + 72774.

Almost surely, 2^28812672 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 28812672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49121160).

28812672 is an abundant number, since it is smaller than the sum of its proper divisors (69429648).

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

28812672 is an equidigital number, since it uses as much as digits as its factorization.

28812672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430 (or 409 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 28812672 is about 5367.7436600494. The cubic root of 28812672 is about 306.5687231854.

The spelling of 28812672 in words is "twenty-eight million, eight hundred twelve thousand, six hundred seventy-two".