28869696 has 70 divisors (see below), whose sum is σ = 85594190. Its totient is φ = 9621504.

The previous prime is 28869691. The next prime is 28869719. The reversal of 28869696 is 69696882.

It can be written as a sum of positive squares in only one way, i.e., 20575296 + 8294400 = 4536^2 + 2880^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28869691) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2400 + ... + 7968.

Almost surely, 2^28869696 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 28869696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42797095).

28869696 is an abundant number, since it is smaller than the sum of its proper divisors (56724494).

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

28869696 is an equidigital number, since it uses as much as digits as its factorization.

28869696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5593 (or 5574 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The square root of 28869696 is about 5373.0527635600. The cubic root of 28869696 is about 306.7708362769.

The spelling of 28869696 in words is "twenty-eight million, eight hundred sixty-nine thousand, six hundred ninety-six".