28500432 has 80 divisors (see below), whose sum is σ = 79548480. Its totient is φ = 8759296.

The previous prime is 28500401. The next prime is 28500463. The reversal of 28500432 is 23400582.

It is an interprime number because it is at equal distance from previous prime (28500401) and next prime (28500463).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42919 + ... + 43577.

It is an arithmetic number, because the mean of its divisors is an integer number (994356).

Almost surely, 2^28500432 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 28500432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39774240).

28500432 is an abundant number, since it is smaller than the sum of its proper divisors (51048048).

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

28500432 is a wasteful number, since it uses less digits than its factorization.

28500432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740 (or 734 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 28500432 is about 5338.5795863694. The cubic root of 28500432 is about 305.4572805620.

The spelling of 28500432 in words is "twenty-eight million, five hundred thousand, four hundred thirty-two".