28210872 has 32 divisors (see below), whose sum is σ = 72435600. Its totient is φ = 9149184.

The previous prime is 28210867. The next prime is 28210907. The reversal of 28210872 is 27801282.

It is a happy number.

It is a congruent number.

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, 14997 + ... + 16772.

Almost surely, 2^28210872 is an apocalyptic number.

It is an amenable number.

28210872 is an abundant number, since it is smaller than the sum of its proper divisors (44224728).

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

28210872 is a wasteful number, since it uses less digits than its factorization.

28210872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31815 (or 31811 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 28210872 is about 5311.3907783179. The cubic root of 28210872 is about 304.4192910036.

The spelling of 28210872 in words is "twenty-eight million, two hundred ten thousand, eight hundred seventy-two".