28303552 has 14 divisors (see below), whose sum is σ = 56164988. Its totient is φ = 14151744.

The previous prime is 28303549. The next prime is 28303553. The reversal of 28303552 is 25530382.

It is a self number, because there is not a number n which added to its sum of digits gives 28303552.

It is not an unprimeable number, because it can be changed into a prime (28303553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221058 + ... + 221185.

Almost surely, 2^28303552 is an apocalyptic number.

It is an amenable number.

28303552 is a deficient number, since it is larger than the sum of its proper divisors (27861436).

28303552 is an equidigital number, since it uses as much as digits as its factorization.

28303552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442255 (or 442245 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 28303552 is about 5320.1082695750. The cubic root of 28303552 is about 304.7522919339.

The spelling of 28303552 in words is "twenty-eight million, three hundred three thousand, five hundred fifty-two".