28164958780 has 24 divisors (see below), whose sum is σ = 67595901408. Its totient is φ = 9656557248.

The previous prime is 28164958751. The next prime is 28164958793. The reversal of 28164958780 is 8785946182.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100588999 + ... + 100589278.

It is an arithmetic number, because the mean of its divisors is an integer number (2816495892).

Almost surely, 2^28164958780 is an apocalyptic number.

28164958780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28164958780 is an abundant number, since it is smaller than the sum of its proper divisors (39430942628).

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

28164958780 is a wasteful number, since it uses less digits than its factorization.

28164958780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201178293 (or 201178291 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 58.

The spelling of 28164958780 in words is "twenty-eight billion, one hundred sixty-four million, nine hundred fifty-eight thousand, seven hundred eighty".