87885930 has 128 divisors (see below), whose sum is σ = 242860032. Its totient is φ = 20328000.

The previous prime is 87885929. The next prime is 87885949. The reversal of 87885930 is 3958878.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 87885930.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1237795 + ... + 1237865.

It is an arithmetic number, because the mean of its divisors is an integer number (1897344).

Almost surely, 2^87885930 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87885930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121430016).

87885930 is an abundant number, since it is smaller than the sum of its proper divisors (154974102).

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

87885930 is a wasteful number, since it uses less digits than its factorization.

87885930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 48.

The square root of 87885930 is about 9374.7495966559. The cubic root of 87885930 is about 444.6037460662.

The spelling of 87885930 in words is "eighty-seven million, eight hundred eighty-five thousand, nine hundred thirty".