28056311530 has 64 divisors (see below), whose sum is σ = 56056065408. Its totient is φ = 10043170560.

The previous prime is 28056311519. The next prime is 28056311531. The reversal of 28056311530 is 3511365082.

It is not an unprimeable number, because it can be changed into a prime (28056311531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1350925 + ... + 1371535.

It is an arithmetic number, because the mean of its divisors is an integer number (875876022).

Almost surely, 2^28056311530 is an apocalyptic number.

28056311530 is a deficient number, since it is larger than the sum of its proper divisors (27999753878).

28056311530 is a wasteful number, since it uses less digits than its factorization.

28056311530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20951.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 28056311530 in words is "twenty-eight billion, fifty-six million, three hundred eleven thousand, five hundred thirty".