87105823420 has 48 divisors (see below), whose sum is σ = 228058887168. Its totient is φ = 27149866560.

The previous prime is 87105823379. The next prime is 87105823423. The reversal of 87105823420 is 2432850178.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87105823423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28279572 + ... + 28282651.

It is an arithmetic number, because the mean of its divisors is an integer number (4751226816).

Almost surely, 2^87105823420 is an apocalyptic number.

It is an amenable number.

87105823420 is an abundant number, since it is smaller than the sum of its proper divisors (140953063748).

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

87105823420 is a wasteful number, since it uses less digits than its factorization.

87105823420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56562250 (or 56562248 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The spelling of 87105823420 in words is "eighty-seven billion, one hundred five million, eight hundred twenty-three thousand, four hundred twenty".