28000755 has 32 divisors (see below), whose sum is σ = 50065920. Its totient is φ = 14847840.

The previous prime is 28000741. The next prime is 28000757. The reversal of 28000755 is 55700082.

It is a happy number.

It is not a de Polignac number, because 28000755 - 2⁶ = 28000691 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (28000757) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27994 + ... + 28976.

It is an arithmetic number, because the mean of its divisors is an integer number (1564560).

Almost surely, 2^28000755 is an apocalyptic number.

28000755 is a deficient number, since it is larger than the sum of its proper divisors (22065165).

28000755 is a wasteful number, since it uses less digits than its factorization.

28000755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208 (or 1202 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 28000755 is about 5291.5739624426. The cubic root of 28000755 is about 303.6616264781.

The spelling of 28000755 in words is "twenty-eight million, seven hundred fifty-five", and thus it is an aban number.