28155226932 has 216 divisors, whose sum is σ = 86019216192. Its totient is φ = 7736198400.

The previous prime is 28155226927. The next prime is 28155226949. The reversal of 28155226932 is 23962255182.

28155226932 is a `hidden beast` number, since 2 + 8 + 1 + 552 + 2 + 6 + 93 + 2 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5132263 + ... + 5137745.

It is an arithmetic number, because the mean of its divisors is an integer number (398237112).

Almost surely, 2^28155226932 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28155226932, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43009608096).

28155226932 is an abundant number, since it is smaller than the sum of its proper divisors (57863989260).

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

28155226932 is a wasteful number, since it uses less digits than its factorization.

28155226932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5619 (or 5607 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The spelling of 28155226932 in words is "twenty-eight billion, one hundred fifty-five million, two hundred twenty-six thousand, nine hundred thirty-two".