28703285 has 16 divisors (see below), whose sum is σ = 37449216. Its totient is φ = 20993088.

The previous prime is 28703249. The next prime is 28703347. The reversal of 28703285 is 58230782.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28703285 - 2¹⁴ = 28686901 is a prime.

It is a Duffinian number.

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, 4892 + ... + 9018.

It is an arithmetic number, because the mean of its divisors is an integer number (2340576).

Almost surely, 2^28703285 is an apocalyptic number.

It is an amenable number.

28703285 is a deficient number, since it is larger than the sum of its proper divisors (8745931).

28703285 is a wasteful number, since it uses less digits than its factorization.

28703285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4252.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 28703285 is about 5357.5446801683. The cubic root of 28703285 is about 306.1802695608.

The spelling of 28703285 in words is "twenty-eight million, seven hundred three thousand, two hundred eighty-five".