28673387 has 12 divisors (see below), whose sum is σ = 30459240. Its totient is φ = 26983968.

The previous prime is 28673377. The next prime is 28673443. The reversal of 28673387 is 78337682.

It is not a de Polignac number, because 28673387 - 2¹⁴ = 28657003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28673317) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35039 + ... + 35847.

It is an arithmetic number, because the mean of its divisors is an integer number (2538270).

Almost surely, 2^28673387 is an apocalyptic number.

28673387 is a deficient number, since it is larger than the sum of its proper divisors (1785853).

28673387 is an equidigital number, since it uses as much as digits as its factorization.

28673387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922 (or 899 counting only the distinct ones).

The product of its digits is 338688, while the sum is 44.

The square root of 28673387 is about 5354.7536824769. The cubic root of 28673387 is about 306.0739244980.

The spelling of 28673387 in words is "twenty-eight million, six hundred seventy-three thousand, three hundred eighty-seven".