28038885 has 16 divisors (see below), whose sum is σ = 51271296. Its totient is φ = 12817728.

The previous prime is 28038883. The next prime is 28038887. The reversal of 28038885 is 58883082.

It is an interprime number because it is at equal distance from previous prime (28038883) and next prime (28038887).

It is not a de Polignac number, because 28038885 - 2¹ = 28038883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28038883) 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, 133414 + ... + 133623.

It is an arithmetic number, because the mean of its divisors is an integer number (3204456).

Almost surely, 2^28038885 is an apocalyptic number.

It is an amenable number.

28038885 is a deficient number, since it is larger than the sum of its proper divisors (23232411).

28038885 is a wasteful number, since it uses less digits than its factorization.

28038885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267052.

The product of its (nonzero) digits is 122880, while the sum is 42.

The square root of 28038885 is about 5295.1756344809. The cubic root of 28038885 is about 303.7994009306.

The spelling of 28038885 in words is "twenty-eight million, thirty-eight thousand, eight hundred eighty-five".