28838015 has 4 divisors (see below), whose sum is σ = 34605624. Its totient is φ = 23070408.

The previous prime is 28838011. The next prime is 28838023. The reversal of 28838015 is 51083882.

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

It is a cyclic number.

It is not a de Polignac number, because 28838015 - 2² = 28838011 is a prime.

It is a super-2 number, since 2×28838015² = 1663262218280450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28838011) 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 3 ways as a sum of consecutive naturals, for example, 2883797 + ... + 2883806.

It is an arithmetic number, because the mean of its divisors is an integer number (8651406).

Almost surely, 2^28838015 is an apocalyptic number.

28838015 is a deficient number, since it is larger than the sum of its proper divisors (5767609).

28838015 is an equidigital number, since it uses as much as digits as its factorization.

28838015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5767608.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 28838015 is about 5370.1038165011. The cubic root of 28838015 is about 306.6585805734.

The spelling of 28838015 in words is "twenty-eight million, eight hundred thirty-eight thousand, fifteen".