87847578 has 160 divisors (see below), whose sum is σ = 248814720. Its totient is φ = 22550400.

The previous prime is 87847549. The next prime is 87847589. The reversal of 87847578 is 87574878.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 869728 + ... + 869828.

It is an arithmetic number, because the mean of its divisors is an integer number (1555092).

Almost surely, 2^87847578 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87847578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124407360).

87847578 is an abundant number, since it is smaller than the sum of its proper divisors (160967142).

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

87847578 is a wasteful number, since it uses less digits than its factorization.

87847578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194 (or 185 counting only the distinct ones).

The product of its digits is 3512320, while the sum is 54.

The square root of 87847578 is about 9372.7038788175. The cubic root of 87847578 is about 444.5390640259.

The spelling of 87847578 in words is "eighty-seven million, eight hundred forty-seven thousand, five hundred seventy-eight".