28860030 has 64 divisors (see below), whose sum is σ = 77889600. Its totient is φ = 7603200.

The previous prime is 28860019. The next prime is 28860059. The reversal of 28860030 is 3006882.

28860030 is a `hidden beast` number, since 28 + 8 + 600 + 30 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 28859976 and 28860003.

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, 23430 + ... + 24630.

It is an arithmetic number, because the mean of its divisors is an integer number (1217025).

Almost surely, 2^28860030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28860030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38944800).

28860030 is an abundant number, since it is smaller than the sum of its proper divisors (49029570).

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

28860030 is a wasteful number, since it uses less digits than its factorization.

28860030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306 (or 1300 counting only the distinct ones).

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

The square root of 28860030 is about 5372.1531996026. The cubic root of 28860030 is about 306.7365953217.

The spelling of 28860030 in words is "twenty-eight million, eight hundred sixty thousand, thirty".