28385315 has 16 divisors (see below), whose sum is σ = 39039168. Its totient is φ = 19408896.

The previous prime is 28385311. The next prime is 28385347. The reversal of 28385315 is 51358382.

It is a cyclic number.

It is not a de Polignac number, because 28385315 - 2² = 28385311 is a prime.

It is a super-2 number, since 2×28385315² = 1611452215298450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (28385311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14219 + ... + 16091.

It is an arithmetic number, because the mean of its divisors is an integer number (2439948).

Almost surely, 2^28385315 is an apocalyptic number.

28385315 is a deficient number, since it is larger than the sum of its proper divisors (10653853).

28385315 is a wasteful number, since it uses less digits than its factorization.

28385315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2318.

The product of its digits is 28800, while the sum is 35.

The square root of 28385315 is about 5327.7870640633. The cubic root of 28385315 is about 305.0454648698.

The spelling of 28385315 in words is "twenty-eight million, three hundred eighty-five thousand, three hundred fifteen".