28269432 has 64 divisors (see below), whose sum is σ = 81252000. Its totient is φ = 9096192.

The previous prime is 28269401. The next prime is 28269491. The reversal of 28269432 is 23496282.

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 an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4008 + ... + 8520.

Almost surely, 2^28269432 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 28269432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40626000).

28269432 is an abundant number, since it is smaller than the sum of its proper divisors (52982568).

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

28269432 is a wasteful number, since it uses less digits than its factorization.

28269432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4557 (or 4547 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 28269432 is about 5316.9006009140. The cubic root of 28269432 is about 304.6297828188.

The spelling of 28269432 in words is "twenty-eight million, two hundred sixty-nine thousand, four hundred thirty-two".