28344820277532 has 48 divisors (see below), whose sum is σ = 72238119512832. Its totient is φ = 8578902823680.

The previous prime is 28344820277531. The next prime is 28344820277551. The reversal of 28344820277532 is 23577202844382.

It is a super-2 number, since 2×28344820277532² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28344820277531) 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, 130349133 + ... + 130566404.

It is an arithmetic number, because the mean of its divisors is an integer number (1504960823184).

Almost surely, 2^{28344820277532} is an apocalyptic number.

28344820277532 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28344820277532 is an abundant number, since it is smaller than the sum of its proper divisors (43893299235300).

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

28344820277532 is a wasteful number, since it uses less digits than its factorization.

28344820277532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260916378 (or 260916376 counting only the distinct ones).

The product of its (nonzero) digits is 36126720, while the sum is 57.

The spelling of 28344820277532 in words is "twenty-eight trillion, three hundred forty-four billion, eight hundred twenty million, two hundred seventy-seven thousand, five hundred thirty-two".