28449615 has 16 divisors (see below), whose sum is σ = 45991008. Its totient is φ = 15015936.

The previous prime is 28449611. The next prime is 28449647. The reversal of 28449615 is 51694482.

It is not a de Polignac number, because 28449615 - 2² = 28449611 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28449611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8322 + ... + 11231.

It is an arithmetic number, because the mean of its divisors is an integer number (2874438).

Almost surely, 2^28449615 is an apocalyptic number.

28449615 is a deficient number, since it is larger than the sum of its proper divisors (17541393).

28449615 is a wasteful number, since it uses less digits than its factorization.

28449615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19658.

The product of its digits is 69120, while the sum is 39.

The square root of 28449615 is about 5333.8180508900. The cubic root of 28449615 is about 305.2756265038.

The spelling of 28449615 in words is "twenty-eight million, four hundred forty-nine thousand, six hundred fifteen".