28687296 has 168 divisors, whose sum is σ = 89830656. Its totient is φ = 8007680.

The previous prime is 28687291. The next prime is 28687301. The reversal of 28687296 is 69278682.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28687291) and next prime (28687301).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28687291) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 610345 + ... + 610391.

Almost surely, 2^28687296 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 28687296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44915328).

28687296 is an abundant number, since it is smaller than the sum of its proper divisors (61143360).

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

28687296 is a wasteful number, since it uses less digits than its factorization.

28687296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107 (or 80 counting only the distinct ones).

The product of its digits is 580608, while the sum is 48.

The square root of 28687296 is about 5356.0522775641. The cubic root of 28687296 is about 306.1234070145.

The spelling of 28687296 in words is "twenty-eight million, six hundred eighty-seven thousand, two hundred ninety-six".