87691776 has 80 divisors (see below), whose sum is σ = 240085824. Its totient is φ = 28422144.

The previous prime is 87691771. The next prime is 87691819. The reversal of 87691776 is 67719678.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (87691771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56061 + ... + 57603.

Almost surely, 2^87691776 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 87691776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120042912).

87691776 is an abundant number, since it is smaller than the sum of its proper divisors (152394048).

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

87691776 is a wasteful number, since it uses less digits than its factorization.

87691776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601 (or 1585 counting only the distinct ones).

The product of its digits is 889056, while the sum is 51.

The square root of 87691776 is about 9364.3887147000. The cubic root of 87691776 is about 444.2761045431.

The spelling of 87691776 in words is "eighty-seven million, six hundred ninety-one thousand, seven hundred seventy-six".