28856011224 has 32 divisors (see below), whose sum is σ = 73362744000. Its totient is φ = 9455641632.

The previous prime is 28856011207. The next prime is 28856011229. The reversal of 28856011224 is 42211065882.

It is a happy number.

It is a super-2 number, since 2×28856011224² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28856011229) 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, 10187854 + ... + 10190685.

It is an arithmetic number, because the mean of its divisors is an integer number (2292585750).

Almost surely, 2^28856011224 is an apocalyptic number.

28856011224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28856011224 is an abundant number, since it is smaller than the sum of its proper divisors (44506732776).

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

28856011224 is a wasteful number, since it uses less digits than its factorization.

28856011224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20378607 (or 20378603 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 39.

The spelling of 28856011224 in words is "twenty-eight billion, eight hundred fifty-six million, eleven thousand, two hundred twenty-four".