86640058 has 16 divisors (see below), whose sum is σ = 138130920. Its totient is φ = 40615936.

The previous prime is 86640053. The next prime is 86640077. The reversal of 86640058 is 85004668.

It can be written as a sum of positive squares in 4 ways, for example, as 83302129 + 3337929 = 9127^2 + 1827^2 .

It is a junction number, because it is equal to n+sod(n) for n = 86639999 and 86640026.

It is not an unprimeable number, because it can be changed into a prime (86640053) 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, 4410 + ... + 13882.

Almost surely, 2^86640058 is an apocalyptic number.

86640058 is a deficient number, since it is larger than the sum of its proper divisors (51490862).

86640058 is a wasteful number, since it uses less digits than its factorization.

86640058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9761.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 86640058 is about 9308.0641381546. The cubic root of 86640058 is about 442.4928369785.

The spelling of 86640058 in words is "eighty-six million, six hundred forty thousand, fifty-eight".