86780393 has 16 divisors (see below), whose sum is σ = 105327360. Its totient is φ = 69797376.

The previous prime is 86780339. The next prime is 86780399. The reversal of 86780393 is 39308768.

It is not a de Polignac number, because 86780393 - 2²⁰ = 85731817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86780399) 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 15 ways as a sum of consecutive naturals, for example, 47780 + ... + 49562.

It is an arithmetic number, because the mean of its divisors is an integer number (6582960).

Almost surely, 2^86780393 is an apocalyptic number.

It is an amenable number.

86780393 is a deficient number, since it is larger than the sum of its proper divisors (18546967).

86780393 is a wasteful number, since it uses less digits than its factorization.

86780393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2216.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 86780393 is about 9315.5994439435. The cubic root of 86780393 is about 442.7316169631.

The spelling of 86780393 in words is "eighty-six million, seven hundred eighty thousand, three hundred ninety-three".