28018755 has 12 divisors (see below), whose sum is σ = 48565920. Its totient is φ = 14943312.

The previous prime is 28018747. The next prime is 28018763. The reversal of 28018755 is 55781082.

It is an interprime number because it is at equal distance from previous prime (28018747) and next prime (28018763).

It is not a de Polignac number, because 28018755 - 2³ = 28018747 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 311275 + ... + 311364.

It is an arithmetic number, because the mean of its divisors is an integer number (4047160).

Almost surely, 2^28018755 is an apocalyptic number.

28018755 is a deficient number, since it is larger than the sum of its proper divisors (20547165).

28018755 is a wasteful number, since it uses less digits than its factorization.

28018755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622650 (or 622647 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The square root of 28018755 is about 5293.2745063902. The cubic root of 28018755 is about 303.7266811342.

The spelling of 28018755 in words is "twenty-eight million, eighteen thousand, seven hundred fifty-five".