28272486 has 32 divisors (see below), whose sum is σ = 62189568. Its totient is φ = 8497440.

The previous prime is 28272481. The next prime is 28272499. The reversal of 28272486 is 68427282.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28272481) 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, 6696 + ... + 10068.

It is an arithmetic number, because the mean of its divisors is an integer number (1943424).

Almost surely, 2^28272486 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28272486, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31094784).

28272486 is an abundant number, since it is smaller than the sum of its proper divisors (33917082).

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

28272486 is a wasteful number, since it uses less digits than its factorization.

28272486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3516.

The product of its digits is 86016, while the sum is 39.

The square root of 28272486 is about 5317.1877905524. The cubic root of 28272486 is about 304.6407523335.

The spelling of 28272486 in words is "twenty-eight million, two hundred seventy-two thousand, four hundred eighty-six".