28763527 has 4 divisors (see below), whose sum is σ = 30976120. Its totient is φ = 26550936.

The previous prime is 28763489. The next prime is 28763531. The reversal of 28763527 is 72536782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72536782 = 2 ⋅36268391.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28763527 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 28763527.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28763597) 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, 1106277 + ... + 1106302.

It is an arithmetic number, because the mean of its divisors is an integer number (7744030).

Almost surely, 2^28763527 is an apocalyptic number.

28763527 is a deficient number, since it is larger than the sum of its proper divisors (2212593).

28763527 is a wasteful number, since it uses less digits than its factorization.

28763527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2212592.

The product of its digits is 141120, while the sum is 40.

The square root of 28763527 is about 5363.1638982973. The cubic root of 28763527 is about 306.3943219810.

The spelling of 28763527 in words is "twenty-eight million, seven hundred sixty-three thousand, five hundred twenty-seven".