28931763 has 16 divisors (see below), whose sum is σ = 45607680. Its totient is φ = 15962016.

The previous prime is 28931759. The next prime is 28931767. The reversal of 28931763 is 36713982.

It is an interprime number because it is at equal distance from previous prime (28931759) and next prime (28931767).

It is not a de Polignac number, because 28931763 - 2² = 28931759 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28931767) 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, 23145 + ... + 24362.

It is an arithmetic number, because the mean of its divisors is an integer number (2850480).

Almost surely, 2^28931763 is an apocalyptic number.

28931763 is a deficient number, since it is larger than the sum of its proper divisors (16675917).

28931763 is a wasteful number, since it uses less digits than its factorization.

28931763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47546.

The product of its digits is 54432, while the sum is 39.

The square root of 28931763 is about 5378.8254294037. The cubic root of 28931763 is about 306.9905212690.

It can be divided in two parts, 2893 and 1763, that added together give a triangular number (4656 = T₉₆).

The spelling of 28931763 in words is "twenty-eight million, nine hundred thirty-one thousand, seven hundred sixty-three".