28435860 has 72 divisors (see below), whose sum is σ = 89465376. Its totient is φ = 7581600.

The previous prime is 28435859. The next prime is 28435877. The reversal of 28435860 is 6853482.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 1935 + ... + 7785.

Almost surely, 2^28435860 is an apocalyptic number.

28435860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28435860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44732688).

28435860 is an abundant number, since it is smaller than the sum of its proper divisors (61029516).

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

28435860 is a wasteful number, since it uses less digits than its factorization.

28435860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5875 (or 5861 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 28435860 is about 5332.5284809366. The cubic root of 28435860 is about 305.2264197084.

The spelling of 28435860 in words is "twenty-eight million, four hundred thirty-five thousand, eight hundred sixty".