86644478 has 8 divisors (see below), whose sum is σ = 137611872. Its totient is φ = 40773856.

The previous prime is 86644477. The next prime is 86644483. The reversal of 86644478 is 87444668.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86644477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1274150 + ... + 1274217.

It is an arithmetic number, because the mean of its divisors is an integer number (17201484).

Almost surely, 2^86644478 is an apocalyptic number.

86644478 is a deficient number, since it is larger than the sum of its proper divisors (50967394).

86644478 is a wasteful number, since it uses less digits than its factorization.

86644478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2548386.

The product of its digits is 1032192, while the sum is 47.

The square root of 86644478 is about 9308.3015636581. The cubic root of 86644478 is about 442.5003615391.

The spelling of 86644478 in words is "eighty-six million, six hundred forty-four thousand, four hundred seventy-eight".