28263815 has 8 divisors (see below), whose sum is σ = 33976800. Its totient is φ = 22570912.

The previous prime is 28263797. The next prime is 28263817. The reversal of 28263815 is 51836282.

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 28263815 - 2¹² = 28259719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28263817) 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, 1724 + ... + 7713.

It is an arithmetic number, because the mean of its divisors is an integer number (4247100).

Almost surely, 2^28263815 is an apocalyptic number.

28263815 is a deficient number, since it is larger than the sum of its proper divisors (5712985).

28263815 is an equidigital number, since it uses as much as digits as its factorization.

28263815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10041.

The product of its digits is 23040, while the sum is 35.

The square root of 28263815 is about 5316.3723534004. The cubic root of 28263815 is about 304.6096053254.

The spelling of 28263815 in words is "twenty-eight million, two hundred sixty-three thousand, eight hundred fifteen".