28840026 has 32 divisors (see below), whose sum is σ = 59071680. Its totient is φ = 9383936.

The previous prime is 28840001. The next prime is 28840027. The reversal of 28840026 is 62004882.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28839975 and 28840002.

It is not an unprimeable number, because it can be changed into a prime (28840027) 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, 90820 + ... + 91136.

It is an arithmetic number, because the mean of its divisors is an integer number (1845990).

Almost surely, 2^28840026 is an apocalyptic number.

28840026 is an abundant number, since it is smaller than the sum of its proper divisors (30231654).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28840026 is a wasteful number, since it uses less digits than its factorization.

28840026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638.

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 28840026 is about 5370.2910535650. The cubic root of 28840026 is about 306.6657086191.

Subtracting from 28840026 its product of nonzero digits (6144), we obtain a palindrome (28833882).

The spelling of 28840026 in words is "twenty-eight million, eight hundred forty thousand, twenty-six".