28292693 has 16 divisors (see below), whose sum is σ = 33746496. Its totient is φ = 23379840.

The previous prime is 28292689. The next prime is 28292699. The reversal of 28292693 is 39629282.

It is not a de Polignac number, because 28292693 - 2² = 28292689 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28292693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28292699) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8105 + ... + 11057.

It is an arithmetic number, because the mean of its divisors is an integer number (2109156).

Almost surely, 2^28292693 is an apocalyptic number.

It is an amenable number.

28292693 is a deficient number, since it is larger than the sum of its proper divisors (5453803).

28292693 is a wasteful number, since it uses less digits than its factorization.

28292693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3044.

The product of its digits is 93312, while the sum is 41.

The square root of 28292693 is about 5319.0876097316. The cubic root of 28292693 is about 304.7133129812.

The spelling of 28292693 in words is "twenty-eight million, two hundred ninety-two thousand, six hundred ninety-three".