28245530 has 8 divisors (see below), whose sum is σ = 50841972. Its totient is φ = 11298208.

The previous prime is 28245521. The next prime is 28245563. The reversal of 28245530 is 3554282.

It can be written as a sum of positive squares in 2 ways, for example, as 28206721 + 38809 = 5311^2 + 197^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 28245493 and 28245502.

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, 1412267 + ... + 1412286.

Almost surely, 2^28245530 is an apocalyptic number.

28245530 is a deficient number, since it is larger than the sum of its proper divisors (22596442).

28245530 is a wasteful number, since it uses less digits than its factorization.

28245530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2824560.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 28245530 is about 5314.6523875038. The cubic root of 28245530 is about 304.5439030818.

The spelling of 28245530 in words is "twenty-eight million, two hundred forty-five thousand, five hundred thirty".