28134432 has 48 divisors (see below), whose sum is σ = 82061280. Its totient is φ = 9377856.

The previous prime is 28134409. The next prime is 28134433. The reversal of 28134432 is 23443182.

It is a tau number, because it is divible by the number of its divisors (48).

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

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

It is a junction number, because it is equal to n+sod(n) for n = 28134396 and 28134405.

It is not an unprimeable number, because it can be changed into a prime (28134433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15418 + ... + 17145.

It is an arithmetic number, because the mean of its divisors is an integer number (1709610).

Almost surely, 2^28134432 is an apocalyptic number.

It is an amenable number.

28134432 is an abundant number, since it is smaller than the sum of its proper divisors (53926848).

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

28134432 is a wasteful number, since it uses less digits than its factorization.

28134432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32582 (or 32568 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 28134432 is about 5304.1900418443. The cubic root of 28134432 is about 304.1440914335.

The spelling of 28134432 in words is "twenty-eight million, one hundred thirty-four thousand, four hundred thirty-two".