28026775 has 36 divisors (see below), whose sum is σ = 40966128. Its totient is φ = 18963840.

The previous prime is 28026773. The next prime is 28026781. The reversal of 28026775 is 57762082.

It is not a de Polignac number, because 28026775 - 2¹ = 28026773 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28026773) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 167742 + ... + 167908.

It is an arithmetic number, because the mean of its divisors is an integer number (1137948).

Almost surely, 2^28026775 is an apocalyptic number.

28026775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28026775 is a deficient number, since it is larger than the sum of its proper divisors (12939353).

28026775 is a wasteful number, since it uses less digits than its factorization.

28026775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328 (or 316 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 28026775 is about 5294.0320172813. The cubic root of 28026775 is about 303.7556576252.

The spelling of 28026775 in words is "twenty-eight million, twenty-six thousand, seven hundred seventy-five".