86820646 has 48 divisors (see below), whose sum is σ = 150764544. Its totient is φ = 37422000.

The previous prime is 86820641. The next prime is 86820647. The reversal of 86820646 is 64602868.

It is a junction number, because it is equal to n+sod(n) for n = 86820599 and 86820608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86820641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 532561 + ... + 532723.

It is an arithmetic number, because the mean of its divisors is an integer number (3140928).

Almost surely, 2^86820646 is an apocalyptic number.

86820646 is a deficient number, since it is larger than the sum of its proper divisors (63943898).

86820646 is a wasteful number, since it uses less digits than its factorization.

86820646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289 (or 278 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 86820646 is about 9317.7597092863. The cubic root of 86820646 is about 442.8000599236.

The spelling of 86820646 in words is "eighty-six million, eight hundred twenty thousand, six hundred forty-six".