28818839 has 16 divisors (see below), whose sum is σ = 36180480. Its totient is φ = 22381920.

The previous prime is 28818833. The next prime is 28818847. The reversal of 28818839 is 93881882.

It is a cyclic number.

It is not a de Polignac number, because 28818839 - 2¹² = 28814743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28818793 and 28818802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28818833) 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, 1652 + ... + 7769.

It is an arithmetic number, because the mean of its divisors is an integer number (2261280).

Almost surely, 2^28818839 is an apocalyptic number.

28818839 is a deficient number, since it is larger than the sum of its proper divisors (7361641).

28818839 is a wasteful number, since it uses less digits than its factorization.

28818839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9470.

The product of its digits is 221184, while the sum is 47.

The square root of 28818839 is about 5368.3180792498. The cubic root of 28818839 is about 306.5905940535.

The spelling of 28818839 in words is "twenty-eight million, eight hundred eighteen thousand, eight hundred thirty-nine".