28513230 has 32 divisors (see below), whose sum is σ = 69558048. Its totient is φ = 7478400.

The previous prime is 28513229. The next prime is 28513259. The reversal of 28513230 is 3231582.

It is a self number, because there is not a number n which added to its sum of digits gives 28513230.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5961 + ... + 9620.

It is an arithmetic number, because the mean of its divisors is an integer number (2173689).

Almost surely, 2^28513230 is an apocalyptic number.

28513230 is an abundant number, since it is smaller than the sum of its proper divisors (41044818).

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

28513230 is a wasteful number, since it uses less digits than its factorization.

28513230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15652.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 28513230 is about 5339.7780852766. The cubic root of 28513230 is about 305.5029951589.

The spelling of 28513230 in words is "twenty-eight million, five hundred thirteen thousand, two hundred thirty".