28859040 has 216 divisors, whose sum is σ = 114840180. Its totient is φ = 6580224.

The previous prime is 28859029. The next prime is 28859053. The reversal of 28859040 is 4095882.

28859040 is a `hidden beast` number, since 28 + 8 + 590 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 28005264 + 853776 = 5292^2 + 924^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 28858986 and 28859004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 70356 + ... + 70764.

Almost surely, 2^28859040 is an apocalyptic number.

28859040 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 28859040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57420090).

28859040 is an abundant number, since it is smaller than the sum of its proper divisors (85981140).

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

28859040 is a wasteful number, since it uses less digits than its factorization.

28859040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444 (or 426 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 28859040 is about 5372.0610569873. The cubic root of 28859040 is about 306.7330879022.

The spelling of 28859040 in words is "twenty-eight million, eight hundred fifty-nine thousand, forty".