28371565 has 8 divisors (see below), whose sum is σ = 34080480. Its totient is φ = 22674192.

The previous prime is 28371559. The next prime is 28371571. The reversal of 28371565 is 56517382.

It is an interprime number because it is at equal distance from previous prime (28371559) and next prime (28371571).

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

It is a cyclic number.

It is not a de Polignac number, because 28371565 - 2³ = 28371557 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4042 + ... + 8548.

It is an arithmetic number, because the mean of its divisors is an integer number (4260060).

Almost surely, 2^28371565 is an apocalyptic number.

It is an amenable number.

28371565 is a deficient number, since it is larger than the sum of its proper divisors (5708915).

28371565 is a wasteful number, since it uses less digits than its factorization.

28371565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5771.

The product of its digits is 50400, while the sum is 37.

The square root of 28371565 is about 5326.4965033312. The cubic root of 28371565 is about 304.9962016906.

The spelling of 28371565 in words is "twenty-eight million, three hundred seventy-one thousand, five hundred sixty-five".