28105236 has 36 divisors (see below), whose sum is σ = 71303232. Its totient is φ = 9334224.

The previous prime is 28105229. The next prime is 28105243. The reversal of 28105236 is 63250182.

It is an interprime number because it is at equal distance from previous prime (28105229) and next prime (28105243).

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9781 + ... + 12323.

Almost surely, 2^28105236 is an apocalyptic number.

It is an amenable number.

28105236 is an abundant number, since it is smaller than the sum of its proper divisors (43197996).

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

28105236 is a wasteful number, since it uses less digits than its factorization.

28105236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2860 (or 2855 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 28105236 is about 5301.4371636378. The cubic root of 28105236 is about 304.0388483364.

The spelling of 28105236 in words is "twenty-eight million, one hundred five thousand, two hundred thirty-six".