86557640 has 32 divisors (see below), whose sum is σ = 209737080. Its totient is φ = 31959552.

The previous prime is 86557631. The next prime is 86557643. The reversal of 86557640 is 4675568.

It can be written as a sum of positive squares in 4 ways, for example, as 37920964 + 48636676 = 6158^2 + 6974^2 .

It is not an unprimeable number, because it can be changed into a prime (86557643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82709 + ... + 83748.

Almost surely, 2^86557640 is an apocalyptic number.

It is an amenable number.

86557640 is an abundant number, since it is smaller than the sum of its proper divisors (123179440).

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

86557640 is a wasteful number, since it uses less digits than its factorization.

86557640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166481 (or 166477 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 41.

The square root of 86557640 is about 9303.6358484197. The cubic root of 86557640 is about 442.3524825603.

The spelling of 86557640 in words is "eighty-six million, five hundred fifty-seven thousand, six hundred forty".