28055323257 has 16 divisors (see below), whose sum is σ = 41267119488. Its totient is φ = 16843720320.

The previous prime is 28055323253. The next prime is 28055323273. The reversal of 28055323257 is 75232355082.

It is not a de Polignac number, because 28055323257 - 2² = 28055323253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28055323253) 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, 8771173 + ... + 8774370.

It is an arithmetic number, because the mean of its divisors is an integer number (2579194968).

Almost surely, 2^28055323257 is an apocalyptic number.

It is an amenable number.

28055323257 is a deficient number, since it is larger than the sum of its proper divisors (13211796231).

28055323257 is a wasteful number, since it uses less digits than its factorization.

28055323257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17545600.

The product of its (nonzero) digits is 504000, while the sum is 42.

It can be divided in two parts, 280553 and 23257, that added together give a triangular number (303810 = T₇₇₉).

The spelling of 28055323257 in words is "twenty-eight billion, fifty-five million, three hundred twenty-three thousand, two hundred fifty-seven".