86678842 has 4 divisors (see below), whose sum is σ = 130018266. Its totient is φ = 43339420.

The previous prime is 86678833. The next prime is 86678843. The reversal of 86678842 is 24887668.

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

It can be written as a sum of positive squares in only one way, i.e., 51998521 + 34680321 = 7211^2 + 5889^2 .

It is not an unprimeable number, because it can be changed into a prime (86678843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21669709 + ... + 21669712.

Almost surely, 2^86678842 is an apocalyptic number.

86678842 is a deficient number, since it is larger than the sum of its proper divisors (43339424).

86678842 is a wasteful number, since it uses less digits than its factorization.

86678842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43339423.

The product of its digits is 1032192, while the sum is 49.

The square root of 86678842 is about 9310.1472598450. The cubic root of 86678842 is about 442.5588537166.

The spelling of 86678842 in words is "eighty-six million, six hundred seventy-eight thousand, eight hundred forty-two".