86784878 has 8 divisors (see below), whose sum is σ = 134666280. Its totient is φ = 41896120.

The previous prime is 86784877. The next prime is 86784923. The reversal of 86784878 is 87848768.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86784871) 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, 748088 + ... + 748203.

It is an arithmetic number, because the mean of its divisors is an integer number (16833285).

Almost surely, 2^86784878 is an apocalyptic number.

86784878 is a deficient number, since it is larger than the sum of its proper divisors (47881402).

86784878 is a wasteful number, since it uses less digits than its factorization.

86784878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496322.

The product of its digits is 4816896, while the sum is 56.

The square root of 86784878 is about 9315.8401660827. The cubic root of 86784878 is about 442.7392439436.

The spelling of 86784878 in words is "eighty-six million, seven hundred eighty-four thousand, eight hundred seventy-eight".