28661735 has 4 divisors (see below), whose sum is σ = 34394088. Its totient is φ = 22929384.

The previous prime is 28661713. The next prime is 28661783. The reversal of 28661735 is 53716682.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28661735 - 2²² = 24467431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2866169 + ... + 2866178.

It is an arithmetic number, because the mean of its divisors is an integer number (8598522).

Almost surely, 2^28661735 is an apocalyptic number.

28661735 is a deficient number, since it is larger than the sum of its proper divisors (5732353).

28661735 is an equidigital number, since it uses as much as digits as its factorization.

28661735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5732352.

The product of its digits is 60480, while the sum is 38.

The square root of 28661735 is about 5353.6655666935. The cubic root of 28661735 is about 306.0324591424.

The spelling of 28661735 in words is "twenty-eight million, six hundred sixty-one thousand, seven hundred thirty-five".