28215755703 has 24 divisors (see below), whose sum is σ = 42450226000. Its totient is φ = 18728324928.

The previous prime is 28215755651. The next prime is 28215755723. The reversal of 28215755703 is 30755751282.

28215755703 is a `hidden beast` number, since 2 + 8 + 2 + 1 + 5 + 75 + 570 + 3 = 666.

It is not a de Polignac number, because 28215755703 - 2²⁴ = 28198978487 is a prime.

It is a super-2 number, since 2×28215755703² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28215755723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 197878 + ... + 309171.

Almost surely, 2^28215755703 is an apocalyptic number.

28215755703 is a deficient number, since it is larger than the sum of its proper divisors (14234470297).

28215755703 is an equidigital number, since it uses as much as digits as its factorization.

28215755703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507293 (or 507281 counting only the distinct ones).

The product of its (nonzero) digits is 588000, while the sum is 45.

The spelling of 28215755703 in words is "twenty-eight billion, two hundred fifteen million, seven hundred fifty-five thousand, seven hundred three".