86340978 has 40 divisors (see below), whose sum is σ = 203657520. Its totient is φ = 27264600.

The previous prime is 86340953. The next prime is 86340979. The reversal of 86340978 is 87904368.

It is a happy number.

86340978 is a `hidden beast` number, since 8 + 634 + 0 + 9 + 7 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (86340979) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10948 + ... + 17103.

It is an arithmetic number, because the mean of its divisors is an integer number (5091438).

Almost surely, 2^86340978 is an apocalyptic number.

86340978 is an abundant number, since it is smaller than the sum of its proper divisors (117316542).

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

86340978 is a wasteful number, since it uses less digits than its factorization.

86340978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28084 (or 28075 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 86340978 is about 9291.9846104048. The cubic root of 86340978 is about 441.9830907449.

The spelling of 86340978 in words is "eighty-six million, three hundred forty thousand, nine hundred seventy-eight".