28873446893 has 4 divisors (see below), whose sum is σ = 29050584768. Its totient is φ = 28696309020.

The previous prime is 28873446863. The next prime is 28873446971. The reversal of 28873446893 is 39864437882.

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.

It is a cyclic number.

It is not a de Polignac number, because 28873446893 - 2⁶ = 28873446829 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 (28873446803) 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, 88568693 + ... + 88569018.

It is an arithmetic number, because the mean of its divisors is an integer number (7262646192).

Almost surely, 2^28873446893 is an apocalyptic number.

It is an amenable number.

28873446893 is a deficient number, since it is larger than the sum of its proper divisors (177137875).

28873446893 is a wasteful number, since it uses less digits than its factorization.

28873446893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177137874.

The product of its digits is 55738368, while the sum is 62.

The spelling of 28873446893 in words is "twenty-eight billion, eight hundred seventy-three million, four hundred forty-six thousand, eight hundred ninety-three".