87016640 has 28 divisors (see below), whose sum is σ = 207209136. Its totient is φ = 34806528.

The previous prime is 87016639. The next prime is 87016661. The reversal of 87016640 is 4661078.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 87016597 and 87016606.

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, 135644 + ... + 136283.

Almost surely, 2^87016640 is an apocalyptic number.

87016640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

87016640 is an abundant number, since it is smaller than the sum of its proper divisors (120192496).

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

87016640 is a wasteful number, since it uses less digits than its factorization.

87016640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271944 (or 271934 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 87016640 is about 9328.2710080700. The cubic root of 87016640 is about 443.1330104192.

The spelling of 87016640 in words is "eighty-seven million, sixteen thousand, six hundred forty".