28435386 has 64 divisors (see below), whose sum is σ = 68140800. Its totient is φ = 7902720.

The previous prime is 28435367. The next prime is 28435397. The reversal of 28435386 is 68353482.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84210 + ... + 84546.

It is an arithmetic number, because the mean of its divisors is an integer number (1064700).

Almost surely, 2^28435386 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28435386, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34070400).

28435386 is an abundant number, since it is smaller than the sum of its proper divisors (39705414).

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

28435386 is a wasteful number, since it uses less digits than its factorization.

28435386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404 (or 390 counting only the distinct ones).

The product of its digits is 138240, while the sum is 39.

The square root of 28435386 is about 5332.4840365443. The cubic root of 28435386 is about 305.2247237497.

The spelling of 28435386 in words is "twenty-eight million, four hundred thirty-five thousand, three hundred eighty-six".