86218646 has 4 divisors (see below), whose sum is σ = 129327972. Its totient is φ = 43109322.

The previous prime is 86218631. The next prime is 86218709. The reversal of 86218646 is 64681268.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21554660 + ... + 21554663.

It is an arithmetic number, because the mean of its divisors is an integer number (32331993).

Almost surely, 2^86218646 is an apocalyptic number.

86218646 is a deficient number, since it is larger than the sum of its proper divisors (43109326).

86218646 is a wasteful number, since it uses less digits than its factorization.

86218646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43109325.

The product of its digits is 110592, while the sum is 41.

The square root of 86218646 is about 9285.3996144485. The cubic root of 86218646 is about 441.7742512015.

The spelling of 86218646 in words is "eighty-six million, two hundred eighteen thousand, six hundred forty-six".