28057730439 has 8 divisors (see below), whose sum is σ = 37753521520. Its totient is φ = 18533546496.

The previous prime is 28057730419. The next prime is 28057730447. The reversal of 28057730439 is 93403775082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28057730439 - 2¹³ = 28057722247 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 (28057730419) 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, 42901402 + ... + 42902055.

It is an arithmetic number, because the mean of its divisors is an integer number (4719190190).

Almost surely, 2^28057730439 is an apocalyptic number.

28057730439 is a deficient number, since it is larger than the sum of its proper divisors (9695791081).

28057730439 is a wasteful number, since it uses less digits than its factorization.

28057730439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85803569.

The product of its (nonzero) digits is 1270080, while the sum is 48.

The spelling of 28057730439 in words is "twenty-eight billion, fifty-seven million, seven hundred thirty thousand, four hundred thirty-nine".