28013785 has 8 divisors (see below), whose sum is σ = 33707520. Its totient is φ = 22350384.

The previous prime is 28013767. The next prime is 28013803. The reversal of 28013785 is 58731082.

It is an interprime number because it is at equal distance from previous prime (28013767) and next prime (28013803).

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

It is a cyclic number.

It is not a de Polignac number, because 28013785 - 2¹⁷ = 27882713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28013785.

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, 5497 + ... + 9286.

It is an arithmetic number, because the mean of its divisors is an integer number (4213440).

Almost surely, 2^28013785 is an apocalyptic number.

It is an amenable number.

28013785 is a deficient number, since it is larger than the sum of its proper divisors (5693735).

28013785 is a wasteful number, since it uses less digits than its factorization.

28013785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15167.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 28013785 is about 5292.8050219142. The cubic root of 28013785 is about 303.7087216059.

The spelling of 28013785 in words is "twenty-eight million, thirteen thousand, seven hundred eighty-five".