28673030293 has 4 divisors (see below), whose sum is σ = 29919683808. Its totient is φ = 27426376780.

The previous prime is 28673030279. The next prime is 28673030341. The reversal of 28673030293 is 39203037682.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39203037682 = 2 ⋅19601518841.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28673030293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28673030203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 623326723 + ... + 623326768.

It is an arithmetic number, because the mean of its divisors is an integer number (7479920952).

Almost surely, 2^28673030293 is an apocalyptic number.

28673030293 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

28673030293 is a deficient number, since it is larger than the sum of its proper divisors (1246653515).

28673030293 is a wasteful number, since it uses less digits than its factorization.

28673030293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246653514.

The product of its (nonzero) digits is 326592, while the sum is 43.

The spelling of 28673030293 in words is "twenty-eight billion, six hundred seventy-three million, thirty thousand, two hundred ninety-three".