28080432 has 100 divisors (see below), whose sum is σ = 83182176. Its totient is φ = 9141120.

The previous prime is 28080431. The next prime is 28080457. The reversal of 28080432 is 23408082.

It is a super-2 number, since 2×28080432² = 1577021322613248, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 28080396 and 28080405.

It is not an unprimeable number, because it can be changed into a prime (28080431) 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, 60682 + ... + 61142.

Almost surely, 2^28080432 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 28080432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41591088).

28080432 is an abundant number, since it is smaller than the sum of its proper divisors (55101744).

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

28080432 is a wasteful number, since it uses less digits than its factorization.

28080432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528 (or 513 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 28080432 is about 5299.0972816132. The cubic root of 28080432 is about 303.9493798448.

The spelling of 28080432 in words is "twenty-eight million, eighty thousand, four hundred thirty-two".