28661335 has 8 divisors (see below), whose sum is σ = 35889120. Its totient is φ = 21932064.

The previous prime is 28661323. The next prime is 28661357. The reversal of 28661335 is 53316682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-28661335 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28661335.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124500 + ... + 124729.

It is an arithmetic number, because the mean of its divisors is an integer number (4486140).

Almost surely, 2^28661335 is an apocalyptic number.

28661335 is a deficient number, since it is larger than the sum of its proper divisors (7227785).

28661335 is a wasteful number, since it uses less digits than its factorization.

28661335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249257.

The product of its digits is 25920, while the sum is 34.

The square root of 28661335 is about 5353.6282089813. The cubic root of 28661335 is about 306.0310354840.

The spelling of 28661335 in words is "twenty-eight million, six hundred sixty-one thousand, three hundred thirty-five".