28780043603 has 8 divisors (see below), whose sum is σ = 31033680720. Its totient is φ = 26600296320.

The previous prime is 28780043587. The next prime is 28780043609. The reversal of 28780043603 is 30634008782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28780043603 - 2⁴ = 28780043587 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28780043609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18471650 + ... + 18473207.

It is an arithmetic number, because the mean of its divisors is an integer number (3879210090).

Almost surely, 2^28780043603 is an apocalyptic number.

28780043603 is a deficient number, since it is larger than the sum of its proper divisors (2253637117).

28780043603 is a wasteful number, since it uses less digits than its factorization.

28780043603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36944917.

The product of its (nonzero) digits is 193536, while the sum is 41.

The spelling of 28780043603 in words is "twenty-eight billion, seven hundred eighty million, forty-three thousand, six hundred three".