28006860 has 48 divisors (see below), whose sum is σ = 89623296. Its totient is φ = 6401472.

The previous prime is 28006859. The next prime is 28006879. The reversal of 28006860 is 6860082.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32922 + ... + 33761.

It is an arithmetic number, because the mean of its divisors is an integer number (1867152).

Almost surely, 2^28006860 is an apocalyptic number.

28006860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28006860 is an abundant number, since it is smaller than the sum of its proper divisors (61616436).

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

28006860 is a wasteful number, since it uses less digits than its factorization.

28006860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66702 (or 66700 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 28006860 is about 5292.1507915024. The cubic root of 28006860 is about 303.6836939725.

The spelling of 28006860 in words is "twenty-eight million, six thousand, eight hundred sixty".