28384775 has 12 divisors (see below), whose sum is σ = 35370504. Its totient is φ = 22596000.

The previous prime is 28384753. The next prime is 28384787. The reversal of 28384775 is 57748382.

It is a happy number.

It is not a de Polignac number, because 28384775 - 2⁶ = 28384711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2585 + ... + 7965.

It is an arithmetic number, because the mean of its divisors is an integer number (2947542).

Almost surely, 2^28384775 is an apocalyptic number.

28384775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28384775 is a deficient number, since it is larger than the sum of its proper divisors (6985729).

28384775 is a wasteful number, since it uses less digits than its factorization.

28384775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5602 (or 5597 counting only the distinct ones).

The product of its digits is 376320, while the sum is 44.

The square root of 28384775 is about 5327.7363861212. The cubic root of 28384775 is about 305.0435304706.

It can be divided in two parts, 283 and 84775, that added together give a palindrome (85058).

The spelling of 28384775 in words is "twenty-eight million, three hundred eighty-four thousand, seven hundred seventy-five".