28885839 has 12 divisors (see below), whose sum is σ = 40914504. Its totient is φ = 18123904.

The previous prime is 28885811. The next prime is 28885849. The reversal of 28885839 is 93858882.

It is not a de Polignac number, because 28885839 - 2⁵ = 28885807 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 28885791 and 28885800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28885849) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15792 + ... + 17525.

It is an arithmetic number, because the mean of its divisors is an integer number (3409542).

Almost surely, 2^28885839 is an apocalyptic number.

28885839 is a deficient number, since it is larger than the sum of its proper divisors (12028665).

28885839 is a wasteful number, since it uses less digits than its factorization.

28885839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33354 (or 33337 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 51.

The square root of 28885839 is about 5374.5547722579. The cubic root of 28885839 is about 306.8280043983.

The spelling of 28885839 in words is "twenty-eight million, eight hundred eighty-five thousand, eight hundred thirty-nine".