28248399 has 8 divisors (see below), whose sum is σ = 41849520. Its totient is φ = 18832248.

The previous prime is 28248397. The next prime is 28248401. The reversal of 28248399 is 99384282.

28248399 is a `hidden beast` number, since 2 + 82 + 483 + 99 = 666.

It is an interprime number because it is at equal distance from previous prime (28248397) and next prime (28248401).

It is not a de Polignac number, because 28248399 - 2¹ = 28248397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28248397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 523092 + ... + 523145.

It is an arithmetic number, because the mean of its divisors is an integer number (5231190).

Almost surely, 2^28248399 is an apocalyptic number.

28248399 is a deficient number, since it is larger than the sum of its proper divisors (13601121).

28248399 is a wasteful number, since it uses less digits than its factorization.

28248399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1046246 (or 1046240 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 28248399 is about 5314.9222948224. The cubic root of 28248399 is about 304.5542139390.

The spelling of 28248399 in words is "twenty-eight million, two hundred forty-eight thousand, three hundred ninety-nine".