28057185399 has 16 divisors (see below), whose sum is σ = 38028994560. Its totient is φ = 18395182560.

The previous prime is 28057185383. The next prime is 28057185413. The reversal of 28057185399 is 99358175082.

It is not a de Polignac number, because 28057185399 - 2⁴ = 28057185383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28057185349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2233474 + ... + 2246000.

It is an arithmetic number, because the mean of its divisors is an integer number (2376812160).

Almost surely, 2^28057185399 is an apocalyptic number.

28057185399 is a deficient number, since it is larger than the sum of its proper divisors (9971809161).

28057185399 is a wasteful number, since it uses less digits than its factorization.

28057185399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24830.

The product of its (nonzero) digits is 5443200, while the sum is 57.

The spelling of 28057185399 in words is "twenty-eight billion, fifty-seven million, one hundred eighty-five thousand, three hundred ninety-nine".