28724602293 has 16 divisors (see below), whose sum is σ = 42563265600. Its totient is φ = 19146000240.

The previous prime is 28724602271. The next prime is 28724602393. The reversal of 28724602293 is 39220642782.

28724602293 is a `hidden beast` number, since 2 + 87 + 2 + 460 + 22 + 93 = 666.

It is not a de Polignac number, because 28724602293 - 2⁸ = 28724602037 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28724602253) 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, 40938 + ... + 243156.

It is an arithmetic number, because the mean of its divisors is an integer number (2660204100).

Almost surely, 2^28724602293 is an apocalyptic number.

It is an amenable number.

28724602293 is a deficient number, since it is larger than the sum of its proper divisors (13838663307).

28724602293 is a wasteful number, since it uses less digits than its factorization.

28724602293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207489 (or 207483 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 28724602293 in words is "twenty-eight billion, seven hundred twenty-four million, six hundred two thousand, two hundred ninety-three".