28690230 has 16 divisors (see below), whose sum is σ = 68856624. Its totient is φ = 7650720.

The previous prime is 28690229. The next prime is 28690273. The reversal of 28690230 is 3209682.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 956341 = 28690230 / (2 + 8 + 6 + 9 + 0 + 2 + 3 + 0).

It is a congruent number.

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, 478141 + ... + 478200.

It is an arithmetic number, because the mean of its divisors is an integer number (4303539).

Almost surely, 2^28690230 is an apocalyptic number.

28690230 is an abundant number, since it is smaller than the sum of its proper divisors (40166394).

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

28690230 is a wasteful number, since it uses less digits than its factorization.

28690230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956351.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 28690230 is about 5356.3261663196. The cubic root of 28690230 is about 306.1338429401.

It can be divided in two parts, 28690 and 230, that added together give a triangular number (28920 = T₂₄₀).

The spelling of 28690230 in words is "twenty-eight million, six hundred ninety thousand, two hundred thirty".