28279296 has 180 divisors, whose sum is σ = 91204542. Its totient is φ = 8404992.

The previous prime is 28279291. The next prime is 28279301. The reversal of 28279296 is 69297282.

It is an interprime number because it is at equal distance from previous prime (28279291) and next prime (28279301).

It can be written as a sum of positive squares in only one way, i.e., 20793600 + 7485696 = 4560^2 + 2736^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28279291) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1488375 + ... + 1488393.

Almost surely, 2^28279296 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 28279296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45602271).

28279296 is an abundant number, since it is smaller than the sum of its proper divisors (62925246).

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

28279296 is a wasteful number, since it uses less digits than its factorization.

28279296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79 (or 41 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 28279296 is about 5317.8281280989. The cubic root of 28279296 is about 304.6652099986.

The spelling of 28279296 in words is "twenty-eight million, two hundred seventy-nine thousand, two hundred ninety-six".