28740663 has 40 divisors (see below), whose sum is σ = 49519008. Its totient is φ = 16272576.

The previous prime is 28740637. The next prime is 28740667. The reversal of 28740663 is 36604782.

It is not a de Polignac number, because 28740663 - 2¹⁴ = 28724279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28740667) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 97945 + ... + 98237.

Almost surely, 2^28740663 is an apocalyptic number.

28740663 is a deficient number, since it is larger than the sum of its proper divisors (20778345).

28740663 is a wasteful number, since it uses less digits than its factorization.

28740663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485 (or 476 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 28740663 is about 5361.0318969392. The cubic root of 28740663 is about 306.3131166315.

It can be divided in two parts, 28740 and 663, that added together give a triangular number (29403 = T₂₄₂).

The spelling of 28740663 in words is "twenty-eight million, seven hundred forty thousand, six hundred sixty-three".