87656646 has 32 divisors (see below), whose sum is σ = 218573568. Its totient is φ = 22767840.

The previous prime is 87656603. The next prime is 87656659. The reversal of 87656646 is 64665678.

It is a junction number, because it is equal to n+sod(n) for n = 87656595 and 87656604.

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, 94405 + ... + 95328.

It is an arithmetic number, because the mean of its divisors is an integer number (6830424).

Almost surely, 2^87656646 is an apocalyptic number.

87656646 is an abundant number, since it is smaller than the sum of its proper divisors (130916922).

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

87656646 is a wasteful number, since it uses less digits than its factorization.

87656646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189756.

The product of its digits is 1451520, while the sum is 48.

The square root of 87656646 is about 9362.5128037296. The cubic root of 87656646 is about 444.2167698108.

The spelling of 87656646 in words is "eighty-seven million, six hundred fifty-six thousand, six hundred forty-six".