28057758715 has 32 divisors (see below), whose sum is σ = 40893272064. Its totient is φ = 18040942080.

The previous prime is 28057758697. The next prime is 28057758733. The reversal of 28057758715 is 51785775082.

It is an interprime number because it is at equal distance from previous prime (28057758697) and next prime (28057758733).

It is a de Polignac number, because none of the positive numbers 2^k-28057758715 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74242 + ... + 248248.

It is an arithmetic number, because the mean of its divisors is an integer number (1277914752).

Almost surely, 2^28057758715 is an apocalyptic number.

28057758715 is a deficient number, since it is larger than the sum of its proper divisors (12835513349).

28057758715 is a wasteful number, since it uses less digits than its factorization.

28057758715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174307.

The product of its (nonzero) digits is 5488000, while the sum is 55.

The spelling of 28057758715 in words is "twenty-eight billion, fifty-seven million, seven hundred fifty-eight thousand, seven hundred fifteen".