28327761 has 48 divisors (see below), whose sum is σ = 52311168. Its totient is φ = 14342400.

The previous prime is 28327757. The next prime is 28327787. The reversal of 28327761 is 16772382.

It is not a de Polignac number, because 28327761 - 2² = 28327757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28327361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27915 + ... + 28911.

It is an arithmetic number, because the mean of its divisors is an integer number (1089816).

Almost surely, 2^28327761 is an apocalyptic number.

28327761 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

28327761 is a deficient number, since it is larger than the sum of its proper divisors (23983407).

28327761 is a wasteful number, since it uses less digits than its factorization.

28327761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062 (or 1059 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 28327761 is about 5322.3830189117. The cubic root of 28327761 is about 304.8391555397.

The spelling of 28327761 in words is "twenty-eight million, three hundred twenty-seven thousand, seven hundred sixty-one".