28261293 has 16 divisors (see below), whose sum is σ = 40450176. Its totient is φ = 17487360.

The previous prime is 28261291. The next prime is 28261301. The reversal of 28261293 is 39216282.

It is a happy number.

It is not a de Polignac number, because 28261293 - 2¹ = 28261291 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28261291) 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 15 ways as a sum of consecutive naturals, for example, 73 + ... + 7518.

It is an arithmetic number, because the mean of its divisors is an integer number (2528136).

Almost surely, 2^28261293 is an apocalyptic number.

It is an amenable number.

28261293 is a deficient number, since it is larger than the sum of its proper divisors (12188883).

28261293 is a wasteful number, since it uses less digits than its factorization.

28261293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7684.

The product of its digits is 10368, while the sum is 33.

The square root of 28261293 is about 5316.1351562954. The cubic root of 28261293 is about 304.6005448798.

The spelling of 28261293 in words is "twenty-eight million, two hundred sixty-one thousand, two hundred ninety-three".