87861716 has 12 divisors (see below), whose sum is σ = 156279060. Its totient is φ = 43210560.

The previous prime is 87861707. The next prime is 87861731. The reversal of 87861716 is 61716878.

It can be written as a sum of positive squares in 2 ways, for example, as 9610000 + 78251716 = 3100^2 + 8846^2 .

It is a super-2 number, since 2×87861716² = 15439362276929312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179801 + ... + 180288.

It is an arithmetic number, because the mean of its divisors is an integer number (13023255).

Almost surely, 2^87861716 is an apocalyptic number.

It is an amenable number.

87861716 is a deficient number, since it is larger than the sum of its proper divisors (68417344).

87861716 is a wasteful number, since it uses less digits than its factorization.

87861716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360154 (or 360152 counting only the distinct ones).

The product of its digits is 112896, while the sum is 44.

The square root of 87861716 is about 9373.4580598624. The cubic root of 87861716 is about 444.5629104665.

The spelling of 87861716 in words is "eighty-seven million, eight hundred sixty-one thousand, seven hundred sixteen".