28747296 has 36 divisors (see below), whose sum is σ = 81750942. Its totient is φ = 9582336.

The previous prime is 28747291. The next prime is 28747319. The reversal of 28747296 is 69274782.

It can be written as a sum of positive squares in only one way, i.e., 22695696 + 6051600 = 4764^2 + 2460^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (28747291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 49621 + ... + 50196.

Almost surely, 2^28747296 is an apocalyptic number.

It is an amenable number.

28747296 is an abundant number, since it is smaller than the sum of its proper divisors (53003646).

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

28747296 is a wasteful number, since it uses less digits than its factorization.

28747296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99833 (or 99822 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 28747296 is about 5361.6504921526. The cubic root of 28747296 is about 306.3366792823.

The spelling of 28747296 in words is "twenty-eight million, seven hundred forty-seven thousand, two hundred ninety-six".