28257955311 has 16 divisors (see below), whose sum is σ = 37839352320. Its totient is φ = 18757669920.

The previous prime is 28257955301. The next prime is 28257955321. The reversal of 28257955311 is 11355975282.

It is an interprime number because it is at equal distance from previous prime (28257955301) and next prime (28257955321).

It is not a de Polignac number, because 28257955311 - 2⁶ = 28257955247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28257955301) 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, 1814046 + ... + 1829556.

It is an arithmetic number, because the mean of its divisors is an integer number (2364959520).

Almost surely, 2^28257955311 is an apocalyptic number.

28257955311 is a deficient number, since it is larger than the sum of its proper divisors (9581397009).

28257955311 is a wasteful number, since it uses less digits than its factorization.

28257955311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18086.

The product of its digits is 756000, while the sum is 48.

The spelling of 28257955311 in words is "twenty-eight billion, two hundred fifty-seven million, nine hundred fifty-five thousand, three hundred eleven".