28236492 has 48 divisors (see below), whose sum is σ = 74602080. Its totient is φ = 9232704.

The previous prime is 28236491. The next prime is 28236493. The reversal of 28236492 is 29463282.

28236492 is a `hidden beast` number, since 2 + 8 + 2 + 3 + 649 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (28236491) and next prime (28236493).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28236491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3258 + ... + 8190.

It is an arithmetic number, because the mean of its divisors is an integer number (1554210).

Almost surely, 2^28236492 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 28236492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37301040).

28236492 is an abundant number, since it is smaller than the sum of its proper divisors (46365588).

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

28236492 is a wasteful number, since it uses less digits than its factorization.

28236492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4999 (or 4991 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 28236492 is about 5313.8020286797. The cubic root of 28236492 is about 304.5114169807.

The spelling of 28236492 in words is "twenty-eight million, two hundred thirty-six thousand, four hundred ninety-two".