28903033493 has 4 divisors (see below), whose sum is σ = 28905353280. Its totient is φ = 28900713708.

The previous prime is 28903033469. The next prime is 28903033499. The reversal of 28903033493 is 39433030982.

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 28903033493 - 2¹⁰ = 28903032469 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 (28903033499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1141103 + ... + 1166156.

It is an arithmetic number, because the mean of its divisors is an integer number (7226338320).

Almost surely, 2^28903033493 is an apocalyptic number.

It is an amenable number.

28903033493 is a deficient number, since it is larger than the sum of its proper divisors (2319787).

28903033493 is a wasteful number, since it uses less digits than its factorization.

28903033493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2319786.

The product of its (nonzero) digits is 419904, while the sum is 44.

The spelling of 28903033493 in words is "twenty-eight billion, nine hundred three million, thirty-three thousand, four hundred ninety-three".