28673787 has 8 divisors (see below), whose sum is σ = 38271760. Its totient is φ = 19095840.

The previous prime is 28673783. The next prime is 28673797. The reversal of 28673787 is 78737682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28673787 - 2² = 28673783 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28673783) 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, 1264 + ... + 7677.

It is an arithmetic number, because the mean of its divisors is an integer number (4783970).

Almost surely, 2^28673787 is an apocalyptic number.

28673787 is a deficient number, since it is larger than the sum of its proper divisors (9597973).

28673787 is a wasteful number, since it uses less digits than its factorization.

28673787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10013.

The product of its digits is 790272, while the sum is 48.

The square root of 28673787 is about 5354.7910323373. The cubic root of 28673787 is about 306.0753477574.

The spelling of 28673787 in words is "twenty-eight million, six hundred seventy-three thousand, seven hundred eighty-seven".