28048915 has 4 divisors (see below), whose sum is σ = 33658704. Its totient is φ = 22439128.

The previous prime is 28048913. The next prime is 28048919. The reversal of 28048915 is 51984082.

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 28048915 - 2¹ = 28048913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28048913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2804887 + ... + 2804896.

It is an arithmetic number, because the mean of its divisors is an integer number (8414676).

Almost surely, 2^28048915 is an apocalyptic number.

28048915 is a deficient number, since it is larger than the sum of its proper divisors (5609789).

28048915 is an equidigital number, since it uses as much as digits as its factorization.

28048915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5609788.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 28048915 is about 5296.1226383081. The cubic root of 28048915 is about 303.8356214000.

It can be divided in two parts, 2804891 and 5, that added together give a triangular number (2804896 = T₂₃₆₈).

The spelling of 28048915 in words is "twenty-eight million, forty-eight thousand, nine hundred fifteen".