28503793917 has 8 divisors (see below), whose sum is σ = 42227842880. Its totient is φ = 19002529260.

The previous prime is 28503793831. The next prime is 28503793931. The reversal of 28503793917 is 71939730582.

28503793917 is a `hidden beast` number, since 28 + 503 + 79 + 39 + 17 = 666.

It is not a de Polignac number, because 28503793917 - 2¹⁹ = 28503269629 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 (28503793957) 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, 527848009 + ... + 527848062.

It is an arithmetic number, because the mean of its divisors is an integer number (5278480360).

Almost surely, 2^28503793917 is an apocalyptic number.

28503793917 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

28503793917 is a deficient number, since it is larger than the sum of its proper divisors (13724048963).

28503793917 is a wasteful number, since it uses less digits than its factorization.

28503793917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055696080 (or 1055696074 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 54.

The spelling of 28503793917 in words is "twenty-eight billion, five hundred three million, seven hundred ninety-three thousand, nine hundred seventeen".