28905268 has 24 divisors (see below), whose sum is σ = 59677184. Its totient is φ = 11988000.

The previous prime is 28905263. The next prime is 28905269. The reversal of 28905268 is 86250982.

It is a self number, because there is not a number n which added to its sum of digits gives 28905268.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28905263) 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 7 ways as a sum of consecutive naturals, for example, 15783 + ... + 17518.

Almost surely, 2^28905268 is an apocalyptic number.

28905268 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28905268 is an abundant number, since it is smaller than the sum of its proper divisors (30771916).

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

28905268 is a wasteful number, since it uses less digits than its factorization.

28905268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33343 (or 33341 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 28905268 is about 5376.3619669810. The cubic root of 28905268 is about 306.8967811812.

The spelling of 28905268 in words is "twenty-eight million, nine hundred five thousand, two hundred sixty-eight".