28327805 has 16 divisors (see below), whose sum is σ = 37274688. Its totient is φ = 20496000.

The previous prime is 28327799. The next prime is 28327807. The reversal of 28327805 is 50872382.

It is a happy number.

It is not a de Polignac number, because 28327805 - 2¹⁴ = 28311421 is a prime.

It is a super-2 number, since 2×28327805² = 1604929072236050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28327807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10385 + ... + 12825.

It is an arithmetic number, because the mean of its divisors is an integer number (2329668).

Almost surely, 2^28327805 is an apocalyptic number.

It is an amenable number.

28327805 is a deficient number, since it is larger than the sum of its proper divisors (8946883).

28327805 is a wasteful number, since it uses less digits than its factorization.

28327805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2668.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 28327805 is about 5322.3871523969. The cubic root of 28327805 is about 304.8393133698.

The spelling of 28327805 in words is "twenty-eight million, three hundred twenty-seven thousand, eight hundred five".