87224015844 has 216 divisors, whose sum is σ = 275078643840. Its totient is φ = 23163573888.

The previous prime is 87224015797. The next prime is 87224015927. The reversal of 87224015844 is 44851042278.

87224015844 is a `hidden beast` number, since 8 + 7 + 22 + 40 + 1 + 584 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 87224015844.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1751797 + ... + 1800899.

It is an arithmetic number, because the mean of its divisors is an integer number (1273512240).

Almost surely, 2^87224015844 is an apocalyptic number.

87224015844 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87224015844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137539321920).

87224015844 is an abundant number, since it is smaller than the sum of its proper divisors (187854627996).

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

87224015844 is a wasteful number, since it uses less digits than its factorization.

87224015844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49199 (or 49187 counting only the distinct ones).

The product of its (nonzero) digits is 573440, while the sum is 45.

The spelling of 87224015844 in words is "eighty-seven billion, two hundred twenty-four million, fifteen thousand, eight hundred forty-four".