28552143864 has 32 divisors (see below), whose sum is σ = 71529408000. Its totient is φ = 9497508192.

The previous prime is 28552143863. The next prime is 28552143877. The reversal of 28552143864 is 46834125582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28552143863) 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, 1230334 + ... + 1253325.

It is an arithmetic number, because the mean of its divisors is an integer number (2235294000).

Almost surely, 2^28552143864 is an apocalyptic number.

28552143864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28552143864 is an abundant number, since it is smaller than the sum of its proper divisors (42977264136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28552143864 is a wasteful number, since it uses less digits than its factorization.

28552143864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2484147 (or 2484143 counting only the distinct ones).

The product of its digits is 1843200, while the sum is 48.

The spelling of 28552143864 in words is "twenty-eight billion, five hundred fifty-two million, one hundred forty-three thousand, eight hundred sixty-four".