28863718 has 16 divisors (see below), whose sum is σ = 46727856. Its totient is φ = 13292640.

The previous prime is 28863683. The next prime is 28863719. The reversal of 28863718 is 81736882.

It is a happy number.

It is a super-2 number, since 2×28863718² = 1666228433567048, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28863719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15033 + ... + 16843.

It is an arithmetic number, because the mean of its divisors is an integer number (2920491).

Almost surely, 2^28863718 is an apocalyptic number.

28863718 is a deficient number, since it is larger than the sum of its proper divisors (17864138).

28863718 is a wasteful number, since it uses less digits than its factorization.

28863718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2439.

The product of its digits is 129024, while the sum is 43.

The square root of 28863718 is about 5372.4964402036. The cubic root of 28863718 is about 306.7496606394.

The spelling of 28863718 in words is "twenty-eight million, eight hundred sixty-three thousand, seven hundred eighteen".