28786212 has 192 divisors, whose sum is σ = 95961600. Its totient is φ = 7257600.

The previous prime is 28786189. The next prime is 28786213. The reversal of 28786212 is 21268782.

It is a happy number.

28786212 is a `hidden beast` number, since 28 + 7 + 8 + 621 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (28786213) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 284962 + ... + 285062.

It is an arithmetic number, because the mean of its divisors is an integer number (499800).

Almost surely, 2^28786212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28786212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47980800).

28786212 is an abundant number, since it is smaller than the sum of its proper divisors (67175388).

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

28786212 is a wasteful number, since it uses less digits than its factorization.

28786212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 155 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 28786212 is about 5365.2783711565. The cubic root of 28786212 is about 306.4748490637.

The spelling of 28786212 in words is "twenty-eight million, seven hundred eighty-six thousand, two hundred twelve".