28008620 has 24 divisors (see below), whose sum is σ = 58968000. Its totient is φ = 11174912.

The previous prime is 28008601. The next prime is 28008637. The reversal of 28008620 is 2680082.

It is a self number, because there is not a number n which added to its sum of digits gives 28008620.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7421 + ... + 10539.

It is an arithmetic number, because the mean of its divisors is an integer number (2457000).

Almost surely, 2^28008620 is an apocalyptic number.

28008620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28008620 is an abundant number, since it is smaller than the sum of its proper divisors (30959380).

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

28008620 is a wasteful number, since it uses less digits than its factorization.

28008620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3577 (or 3575 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 28008620 is about 5292.3170728897. The cubic root of 28008620 is about 303.6900551772.

The spelling of 28008620 in words is "twenty-eight million, eight thousand, six hundred twenty".