28491327 has 24 divisors (see below), whose sum is σ = 42666624. Its totient is φ = 18308304.

The previous prime is 28491301. The next prime is 28491329. The reversal of 28491327 is 72319482.

It is not a de Polignac number, because 28491327 - 2¹² = 28487231 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28491291 and 28491300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28491329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31678 + ... + 32564.

It is an arithmetic number, because the mean of its divisors is an integer number (1777776).

Almost surely, 2^28491327 is an apocalyptic number.

28491327 is a deficient number, since it is larger than the sum of its proper divisors (14175297).

28491327 is a wasteful number, since it uses less digits than its factorization.

28491327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1019 (or 1016 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 28491327 is about 5337.7267633329. The cubic root of 28491327 is about 305.4247490696.

The spelling of 28491327 in words is "twenty-eight million, four hundred ninety-one thousand, three hundred twenty-seven".