28319532 has 24 divisors (see below), whose sum is σ = 68952576. Its totient is φ = 9029328.

The previous prime is 28319531. The next prime is 28319539. The reversal of 28319532 is 23591382.

It is a junction number, because it is equal to n+sod(n) for n = 28319493 and 28319502.

It is not an unprimeable number, because it can be changed into a prime (28319531) 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, 51028 + ... + 51579.

It is an arithmetic number, because the mean of its divisors is an integer number (2873024).

Almost surely, 2^28319532 is an apocalyptic number.

It is an amenable number.

28319532 is an abundant number, since it is smaller than the sum of its proper divisors (40633044).

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

28319532 is a wasteful number, since it uses less digits than its factorization.

28319532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102637 (or 102635 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 28319532 is about 5321.6099067857. The cubic root of 28319532 is about 304.8096348591.

The spelling of 28319532 in words is "twenty-eight million, three hundred nineteen thousand, five hundred thirty-two".