28764115 has 4 divisors (see below), whose sum is σ = 34516944. Its totient is φ = 23011288.

The previous prime is 28764091. The next prime is 28764139. The reversal of 28764115 is 51146782.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (28764091) and next prime (28764139).

It is a cyclic number.

It is not a de Polignac number, because 28764115 - 2¹⁷ = 28633043 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2876407 + ... + 2876416.

It is an arithmetic number, because the mean of its divisors is an integer number (8629236).

Almost surely, 2^28764115 is an apocalyptic number.

28764115 is a deficient number, since it is larger than the sum of its proper divisors (5752829).

28764115 is an equidigital number, since it uses as much as digits as its factorization.

28764115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5752828.

The product of its digits is 13440, while the sum is 34.

The square root of 28764115 is about 5363.2187164053. The cubic root of 28764115 is about 306.3964097944.

It can be divided in two parts, 2876411 and 5, that added together give a square (2876416 = 1696²).

The spelling of 28764115 in words is "twenty-eight million, seven hundred sixty-four thousand, one hundred fifteen".