28616615 has 16 divisors (see below), whose sum is σ = 35108640. Its totient is φ = 22387200.

The previous prime is 28616587. The next prime is 28616617. The reversal of 28616615 is 51661682.

It is a happy number.

It is not a de Polignac number, because 28616615 - 2²⁰ = 27568039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28616617) 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, 47315 + ... + 47915.

It is an arithmetic number, because the mean of its divisors is an integer number (2194290).

Almost surely, 2^28616615 is an apocalyptic number.

28616615 is a deficient number, since it is larger than the sum of its proper divisors (6492025).

28616615 is a wasteful number, since it uses less digits than its factorization.

28616615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802.

The product of its digits is 17280, while the sum is 35.

The square root of 28616615 is about 5349.4499717261. The cubic root of 28616615 is about 305.8717868892.

The spelling of 28616615 in words is "twenty-eight million, six hundred sixteen thousand, six hundred fifteen".