56728263 has 16 divisors (see below), whose sum is σ = 78825600. Its totient is φ = 36244320.

The previous prime is 56728253. The next prime is 56728271. The reversal of 56728263 is 36282765.

It is not a de Polignac number, because 56728263 - 2¹² = 56724167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56728213) 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, 9748 + ... + 14438.

It is an arithmetic number, because the mean of its divisors is an integer number (4926600).

Almost surely, 2^56728263 is an apocalyptic number.

56728263 is a deficient number, since it is larger than the sum of its proper divisors (22097337).

56728263 is a wasteful number, since it uses less digits than its factorization.

56728263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4862.

The product of its digits is 120960, while the sum is 39.

The square root of 56728263 is about 7531.8167131178. The cubic root of 56728263 is about 384.2375713604.

The spelling of 56728263 in words is "fifty-six million, seven hundred twenty-eight thousand, two hundred sixty-three".