86240878 has 4 divisors (see below), whose sum is σ = 129361320. Its totient is φ = 43120438.

The previous prime is 86240873. The next prime is 86240879. The reversal of 86240878 is 87804268.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86240873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21560218 + ... + 21560221.

It is an arithmetic number, because the mean of its divisors is an integer number (32340330).

Almost surely, 2^86240878 is an apocalyptic number.

86240878 is a deficient number, since it is larger than the sum of its proper divisors (43120442).

86240878 is a wasteful number, since it uses less digits than its factorization.

86240878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43120441.

The product of its (nonzero) digits is 172032, while the sum is 43.

The square root of 86240878 is about 9286.5966855463. The cubic root of 86240878 is about 441.8122193269.

The spelling of 86240878 in words is "eighty-six million, two hundred forty thousand, eight hundred seventy-eight".