28387632 has 160 divisors (see below), whose sum is σ = 92549632. Its totient is φ = 7299072.

The previous prime is 28387627. The next prime is 28387643. The reversal of 28387632 is 23678382.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

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

Its product of digits (96768) is a multiple of the sum of its prime divisors (189).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 292608 + ... + 292704.

Almost surely, 2^28387632 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 28387632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46274816).

28387632 is an abundant number, since it is smaller than the sum of its proper divisors (64162000).

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

28387632 is a wasteful number, since it uses less digits than its factorization.

28387632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195 (or 189 counting only the distinct ones).

The product of its digits is 96768, while the sum is 39.

The square root of 28387632 is about 5328.0045045026. The cubic root of 28387632 is about 305.0537645970.

The spelling of 28387632 in words is "twenty-eight million, three hundred eighty-seven thousand, six hundred thirty-two".