28611117 has 8 divisors (see below), whose sum is σ = 42386880. Its totient is φ = 19074060.

The previous prime is 28611113. The next prime is 28611127. The reversal of 28611117 is 71111682.

It is not a de Polignac number, because 28611117 - 2² = 28611113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1059671 = 28611117 / (2 + 8 + 6 + 1 + 1 + 1 + 1 + 7).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28611113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 529809 + ... + 529862.

It is an arithmetic number, because the mean of its divisors is an integer number (5298360).

Almost surely, 2^28611117 is an apocalyptic number.

28611117 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

28611117 is a deficient number, since it is larger than the sum of its proper divisors (13775763).

28611117 is a wasteful number, since it uses less digits than its factorization.

28611117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059680 (or 1059674 counting only the distinct ones).

The product of its digits is 672, while the sum is 27.

The square root of 28611117 is about 5348.9360624334. The cubic root of 28611117 is about 305.8521969785.

Adding to 28611117 its reverse (71111682), we get a palindrome (99722799).

The spelling of 28611117 in words is "twenty-eight million, six hundred eleven thousand, one hundred seventeen".