28417886772 has 48 divisors (see below), whose sum is σ = 72530496192. Its totient is φ = 8588378880.

The previous prime is 28417886771. The next prime is 28417886797. The reversal of 28417886772 is 27768871482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28417886771) 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, 239353 + ... + 337824.

It is an arithmetic number, because the mean of its divisors is an integer number (1511052004).

Almost surely, 2^28417886772 is an apocalyptic number.

28417886772 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28417886772 is an abundant number, since it is smaller than the sum of its proper divisors (44112609420).

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

28417886772 is a wasteful number, since it uses less digits than its factorization.

28417886772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577568 (or 577566 counting only the distinct ones).

The product of its digits is 16859136, while the sum is 60.

The spelling of 28417886772 in words is "twenty-eight billion, four hundred seventeen million, eight hundred eighty-six thousand, seven hundred seventy-two".