28339530 has 16 divisors (see below), whose sum is σ = 68014944. Its totient is φ = 7557200.

The previous prime is 28339513. The next prime is 28339559. The reversal of 28339530 is 3593382.

It is a junction number, because it is equal to n+sod(n) for n = 28339491 and 28339500.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 472296 + ... + 472355.

It is an arithmetic number, because the mean of its divisors is an integer number (4250934).

Almost surely, 2^28339530 is an apocalyptic number.

28339530 is an abundant number, since it is smaller than the sum of its proper divisors (39675414).

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

28339530 is a wasteful number, since it uses less digits than its factorization.

28339530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944661.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 28339530 is about 5323.4885178800. The cubic root of 28339530 is about 304.8813656682.

The spelling of 28339530 in words is "twenty-eight million, three hundred thirty-nine thousand, five hundred thirty".