28860000 has 240 divisors, whose sum is σ = 104703984. Its totient is φ = 6912000.

The previous prime is 28859981. The next prime is 28860001. The reversal of 28860000 is 6882.

It is a tau number, because it is divible by the number of its divisors (240).

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28860001) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 779982 + ... + 780018.

Almost surely, 2^28860000 is an apocalyptic number.

28860000 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 28860000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52351992).

28860000 is an abundant number, since it is smaller than the sum of its proper divisors (75843984).

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

28860000 is a wasteful number, since it uses less digits than its factorization.

28860000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83 (or 60 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 28860000 is about 5372.1504074253. The cubic root of 28860000 is about 306.7364890375.

Adding to 28860000 its reverse (6882), we get a palindrome (28866882).

The spelling of 28860000 in words is "twenty-eight million, eight hundred sixty thousand".