28105377 has 16 divisors (see below), whose sum is σ = 38864448. Its totient is φ = 18053120.

The previous prime is 28105373. The next prime is 28105391. The reversal of 28105377 is 77350182.

It is not a de Polignac number, because 28105377 - 2² = 28105373 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28105373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8833 + ... + 11585.

It is an arithmetic number, because the mean of its divisors is an integer number (2429028).

Almost surely, 2^28105377 is an apocalyptic number.

It is an amenable number.

28105377 is a deficient number, since it is larger than the sum of its proper divisors (10759071).

28105377 is a wasteful number, since it uses less digits than its factorization.

28105377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2880.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 28105377 is about 5301.4504619019. The cubic root of 28105377 is about 304.0393567755.

It can be divided in two parts, 28105 and 377, that added together give a palindrome (28482).

The spelling of 28105377 in words is "twenty-eight million, one hundred five thousand, three hundred seventy-seven".