28632863 has 16 divisors (see below), whose sum is σ = 33495360. Its totient is φ = 23970816.

The previous prime is 28632859. The next prime is 28632893. The reversal of 28632863 is 36823682.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28632863 - 2² = 28632859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28632803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69803 + ... + 70211.

It is an arithmetic number, because the mean of its divisors is an integer number (2093460).

Almost surely, 2^28632863 is an apocalyptic number.

28632863 is a deficient number, since it is larger than the sum of its proper divisors (4862497).

28632863 is a wasteful number, since it uses less digits than its factorization.

28632863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626.

The product of its digits is 82944, while the sum is 38.

The square root of 28632863 is about 5350.9684170251. The cubic root of 28632863 is about 305.9296654387.

It can be divided in two parts, 2863286 and 3, that multiplied together give a palindrome (8589858).

The spelling of 28632863 in words is "twenty-eight million, six hundred thirty-two thousand, eight hundred sixty-three".