86547878 has 4 divisors (see below), whose sum is σ = 129821820. Its totient is φ = 43273938.

The previous prime is 86547871. The next prime is 86547883. The reversal of 86547878 is 87874568.

It is a happy number.

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 (86547871) 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 as a sum of consecutive naturals, namely, 21636968 + ... + 21636971.

It is an arithmetic number, because the mean of its divisors is an integer number (32455455).

Almost surely, 2^86547878 is an apocalyptic number.

86547878 is a deficient number, since it is larger than the sum of its proper divisors (43273942).

86547878 is a wasteful number, since it uses less digits than its factorization.

86547878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43273941.

The product of its digits is 3010560, while the sum is 53.

The square root of 86547878 is about 9303.1112000234. Note that the first 3 decimals coincide. The cubic root of 86547878 is about 442.3358523807.

The spelling of 86547878 in words is "eighty-six million, five hundred forty-seven thousand, eight hundred seventy-eight".