28761263 has 4 divisors (see below), whose sum is σ = 30453120. Its totient is φ = 27069408.

The previous prime is 28761253. The next prime is 28761277. The reversal of 28761263 is 36216782.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28761263 - 2¹⁴ = 28744879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28761223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 845903 + ... + 845936.

It is an arithmetic number, because the mean of its divisors is an integer number (7613280).

Almost surely, 2^28761263 is an apocalyptic number.

28761263 is a deficient number, since it is larger than the sum of its proper divisors (1691857).

28761263 is a wasteful number, since it uses less digits than its factorization.

28761263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1691856.

The product of its digits is 24192, while the sum is 35.

The square root of 28761263 is about 5362.9528247039. The cubic root of 28761263 is about 306.3862829234.

The spelling of 28761263 in words is "twenty-eight million, seven hundred sixty-one thousand, two hundred sixty-three".