28005270 has 32 divisors (see below), whose sum is σ = 67564800. Its totient is φ = 7428960.

The previous prime is 28005269. The next prime is 28005317. The reversal of 28005270 is 7250082.

It is a self number, because there is not a number n which added to its sum of digits gives 28005270.

It is a congruent number.

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, 3625 + ... + 8315.

It is an arithmetic number, because the mean of its divisors is an integer number (2111400).

Almost surely, 2^28005270 is an apocalyptic number.

28005270 is an abundant number, since it is smaller than the sum of its proper divisors (39559530).

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

28005270 is a wasteful number, since it uses less digits than its factorization.

28005270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4900.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 28005270 is about 5292.0005668934. Note that the first 3 decimals coincide. The cubic root of 28005270 is about 303.6779469733.

The spelling of 28005270 in words is "twenty-eight million, five thousand, two hundred seventy".