28891204239 has 16 divisors (see below), whose sum is σ = 39163859424. Its totient is φ = 18939849600.

The previous prime is 28891204229. The next prime is 28891204249. The reversal of 28891204239 is 93240219882.

It is an interprime number because it is at equal distance from previous prime (28891204229) and next prime (28891204249).

It is not a de Polignac number, because 28891204239 - 2⁸ = 28891203983 is a prime.

It is a super-2 number, since 2×28891204239² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28891204229) 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, 714709 + ... + 754049.

It is an arithmetic number, because the mean of its divisors is an integer number (2447741214).

Almost surely, 2^28891204239 is an apocalyptic number.

28891204239 is a deficient number, since it is larger than the sum of its proper divisors (10272655185).

28891204239 is a wasteful number, since it uses less digits than its factorization.

28891204239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43418.

The product of its (nonzero) digits is 497664, while the sum is 48.

The spelling of 28891204239 in words is "twenty-eight billion, eight hundred ninety-one million, two hundred four thousand, two hundred thirty-nine".