28347530 has 8 divisors (see below), whose sum is σ = 51025572. Its totient is φ = 11339008.

The previous prime is 28347511. The next prime is 28347541. The reversal of 28347530 is 3574382.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 26183689 + 2163841 = 5117^2 + 1471^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1417367 + ... + 1417386.

Almost surely, 2^28347530 is an apocalyptic number.

28347530 is a deficient number, since it is larger than the sum of its proper divisors (22678042).

28347530 is a wasteful number, since it uses less digits than its factorization.

28347530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2834760.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 28347530 is about 5324.2398518474. The cubic root of 28347530 is about 304.9100514116.

The spelling of 28347530 in words is "twenty-eight million, three hundred forty-seven thousand, five hundred thirty".