28863432 has 128 divisors (see below), whose sum is σ = 91056000. Its totient is φ = 8398080.

The previous prime is 28863427. The next prime is 28863437. The reversal of 28863432 is 23436882.

It is an interprime number because it is at equal distance from previous prime (28863427) and next prime (28863437).

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 not an unprimeable number, because it can be changed into a prime (28863437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53082 + ... + 53622.

It is an arithmetic number, because the mean of its divisors is an integer number (711375).

Almost surely, 2^28863432 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 28863432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45528000).

28863432 is an abundant number, since it is smaller than the sum of its proper divisors (62192568).

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

28863432 is a wasteful number, since it uses less digits than its factorization.

28863432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588 (or 578 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 28863432 is about 5372.4698230888. The cubic root of 28863432 is about 306.7486474794.

The spelling of 28863432 in words is "twenty-eight million, eight hundred sixty-three thousand, four hundred thirty-two".