28575830 has 16 divisors (see below), whose sum is σ = 51641280. Its totient is φ = 11384832.

The previous prime is 28575763. The next prime is 28575839. The reversal of 28575830 is 3857582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28575839) 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, 2990 + ... + 8129.

It is an arithmetic number, because the mean of its divisors is an integer number (3227580).

Almost surely, 2^28575830 is an apocalyptic number.

28575830 is a deficient number, since it is larger than the sum of its proper divisors (23065450).

28575830 is a wasteful number, since it uses less digits than its factorization.

28575830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11383.

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 28575830 is about 5345.6365383367. The cubic root of 28575830 is about 305.7264061717.

The spelling of 28575830 in words is "twenty-eight million, five hundred seventy-five thousand, eight hundred thirty".