28261597 has 8 divisors (see below), whose sum is σ = 34783616. Its totient is φ = 22360752.

The previous prime is 28261591. The next prime is 28261601. The reversal of 28261597 is 79516282.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28261597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28261591) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 155193 + ... + 155374.

It is an arithmetic number, because the mean of its divisors is an integer number (4347952).

Almost surely, 2^28261597 is an apocalyptic number.

It is an amenable number.

28261597 is a deficient number, since it is larger than the sum of its proper divisors (6522019).

28261597 is a wasteful number, since it uses less digits than its factorization.

28261597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310587.

The product of its digits is 60480, while the sum is 40.

The square root of 28261597 is about 5316.1637484186. The cubic root of 28261597 is about 304.6016370477.

The spelling of 28261597 in words is "twenty-eight million, two hundred sixty-one thousand, five hundred ninety-seven".