28699272 has 224 divisors, whose sum is σ = 99681600. Its totient is φ = 7558272.

The previous prime is 28699271. The next prime is 28699277. The reversal of 28699272 is 27299682.

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

It is a taxicab number since it can be written as a sum of two cubes in more than one way. Here 28699272 = 36³ + 306³ = 242³ + 244³.

It is not an unprimeable number, because it can be changed into a prime (28699271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 775638 + ... + 775674.

Almost surely, 2^28699272 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 28699272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49840800).

28699272 is an abundant number, since it is smaller than the sum of its proper divisors (70982328).

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

28699272 is a wasteful number, since it uses less digits than its factorization.

28699272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87 (or 68 counting only the distinct ones).

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

The square root of 28699272 is about 5357.1701485019. The cubic root of 28699272 is about 306.1659998969.

The spelling of 28699272 in words is "twenty-eight million, six hundred ninety-nine thousand, two hundred seventy-two".