87131576 has 64 divisors (see below), whose sum is σ = 196577280. Its totient is φ = 35418240.

The previous prime is 87131563. The next prime is 87131581. The reversal of 87131576 is 67513178.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91535 + ... + 92481.

It is an arithmetic number, because the mean of its divisors is an integer number (3071520).

Almost surely, 2^87131576 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87131576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98288640).

87131576 is an abundant number, since it is smaller than the sum of its proper divisors (109445704).

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

87131576 is a wasteful number, since it uses less digits than its factorization.

87131576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044 (or 1040 counting only the distinct ones).

The product of its digits is 35280, while the sum is 38.

The square root of 87131576 is about 9334.4296022842. The cubic root of 87131576 is about 443.3280287806.

The spelling of 87131576 in words is "eighty-seven million, one hundred thirty-one thousand, five hundred seventy-six".