28113426 has 128 divisors (see below), whose sum is σ = 74649600. Its totient is φ = 7750080.

The previous prime is 28113403. The next prime is 28113431. The reversal of 28113426 is 62431182.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 28113426.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 530416 + ... + 530468.

It is an arithmetic number, because the mean of its divisors is an integer number (583200).

Almost surely, 2^28113426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28113426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37324800).

28113426 is an abundant number, since it is smaller than the sum of its proper divisors (46536174).

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

28113426 is a wasteful number, since it uses less digits than its factorization.

28113426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141 (or 135 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 28113426 is about 5302.2095394279. The cubic root of 28113426 is about 304.0683782590.

The spelling of 28113426 in words is "twenty-eight million, one hundred thirteen thousand, four hundred twenty-six".