86436378 has 24 divisors (see below), whose sum is σ = 214033248. Its totient is φ = 24696072.

The previous prime is 86436373. The next prime is 86436391. The reversal of 86436378 is 87363468.

86436378 is a `hidden beast` number, since 8 + 6 + 4 + 3 + 637 + 8 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (86436373) 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 in 11 ways as a sum of consecutive naturals, for example, 342876 + ... + 343127.

It is an arithmetic number, because the mean of its divisors is an integer number (8918052).

Almost surely, 2^86436378 is an apocalyptic number.

86436378 is an abundant number, since it is smaller than the sum of its proper divisors (127596870).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

86436378 is a wasteful number, since it uses less digits than its factorization.

86436378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686018 (or 686015 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 86436378 is about 9297.1166498006. The cubic root of 86436378 is about 442.1458163615.

The spelling of 86436378 in words is "eighty-six million, four hundred thirty-six thousand, three hundred seventy-eight".