28775363 has 4 divisors (see below), whose sum is σ = 28982520. Its totient is φ = 28568208.

The previous prime is 28775333. The next prime is 28775371. The reversal of 28775363 is 36357782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36357782 = 2 ⋅18178891.

It is a cyclic number.

It is not a de Polignac number, because 28775363 - 2⁸ = 28775107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28775363.

It is not an unprimeable number, because it can be changed into a prime (28775333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103370 + ... + 103647.

It is an arithmetic number, because the mean of its divisors is an integer number (7245630).

Almost surely, 2^28775363 is an apocalyptic number.

28775363 is a deficient number, since it is larger than the sum of its proper divisors (207157).

28775363 is a wasteful number, since it uses less digits than its factorization.

28775363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207156.

The product of its digits is 211680, while the sum is 41.

The square root of 28775363 is about 5364.2672379366. The cubic root of 28775363 is about 306.4363426261.

The spelling of 28775363 in words is "twenty-eight million, seven hundred seventy-five thousand, three hundred sixty-three".