86204978 has 16 divisors (see below), whose sum is σ = 131017824. Its totient is φ = 42535680.

The previous prime is 86204971. The next prime is 86204983. The reversal of 86204978 is 87940268.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (86204971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70226 + ... + 71442.

It is an arithmetic number, because the mean of its divisors is an integer number (8188614).

Almost surely, 2^86204978 is an apocalyptic number.

86204978 is a deficient number, since it is larger than the sum of its proper divisors (44812846).

86204978 is a wasteful number, since it uses less digits than its factorization.

86204978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1657.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 86204978 is about 9284.6635911055. The cubic root of 86204978 is about 441.7509055571.

The spelling of 86204978 in words is "eighty-six million, two hundred four thousand, nine hundred seventy-eight".