28616611 has 4 divisors (see below), whose sum is σ = 28691712. Its totient is φ = 28541512.

The previous prime is 28616587. The next prime is 28616617. The reversal of 28616611 is 11661682.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11661682 = 2 ⋅5830841.

It is a cyclic number.

It is not a de Polignac number, because 28616611 - 2⁵ = 28616579 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 36976 + ... + 37741.

It is an arithmetic number, because the mean of its divisors is an integer number (7172928).

Almost surely, 2^28616611 is an apocalyptic number.

28616611 is a deficient number, since it is larger than the sum of its proper divisors (75101).

28616611 is an equidigital number, since it uses as much as digits as its factorization.

28616611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75100.

The product of its digits is 3456, while the sum is 31.

The square root of 28616611 is about 5349.4495978558. The cubic root of 28616611 is about 305.8717726377.

The spelling of 28616611 in words is "twenty-eight million, six hundred sixteen thousand, six hundred eleven".