28731327 has 8 divisors (see below), whose sum is σ = 39544320. Its totient is φ = 18536280.

The previous prime is 28731317. The next prime is 28731341. The reversal of 28731327 is 72313782.

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

It is not a de Polignac number, because 28731327 - 2¹⁸ = 28469183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28731317) 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, 154377 + ... + 154562.

It is an arithmetic number, because the mean of its divisors is an integer number (4943040).

Almost surely, 2^28731327 is an apocalyptic number.

28731327 is a deficient number, since it is larger than the sum of its proper divisors (10812993).

28731327 is a wasteful number, since it uses less digits than its factorization.

28731327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308973.

The product of its digits is 14112, while the sum is 33.

The square root of 28731327 is about 5360.1610983253. The cubic root of 28731327 is about 306.2799458708.

The spelling of 28731327 in words is "twenty-eight million, seven hundred thirty-one thousand, three hundred twenty-seven".