28660743 has 8 divisors (see below), whose sum is σ = 42460400. Its totient is φ = 19107144.

The previous prime is 28660739. The next prime is 28660781. The reversal of 28660743 is 34706682.

28660743 is a `hidden beast` number, since 2 + 8 + 6 + 607 + 43 = 666.

It is not a de Polignac number, because 28660743 - 2² = 28660739 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28660698 and 28660707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28660733) 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, 530728 + ... + 530781.

It is an arithmetic number, because the mean of its divisors is an integer number (5307550).

Almost surely, 2^28660743 is an apocalyptic number.

28660743 is a deficient number, since it is larger than the sum of its proper divisors (13799657).

28660743 is a wasteful number, since it uses less digits than its factorization.

28660743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061518 (or 1061512 counting only the distinct ones).

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

The square root of 28660743 is about 5353.5729190887. The cubic root of 28660743 is about 306.0289284454.

It can be divided in two parts, 28660 and 743, that added together give a triangular number (29403 = T₂₄₂).

The spelling of 28660743 in words is "twenty-eight million, six hundred sixty thousand, seven hundred forty-three".