86778494 has 32 divisors (see below), whose sum is σ = 149299200. Its totient is φ = 37444000.

The previous prime is 86778487. The next prime is 86778499. The reversal of 86778494 is 49487768.

It is a super-3 number, since 3×86778494³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86778499) 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, 74819 + ... + 75969.

It is an arithmetic number, because the mean of its divisors is an integer number (4665600).

Almost surely, 2^86778494 is an apocalyptic number.

86778494 is a deficient number, since it is larger than the sum of its proper divisors (62520706).

86778494 is a wasteful number, since it uses less digits than its factorization.

86778494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336.

The product of its digits is 2709504, while the sum is 53.

The square root of 86778494 is about 9315.4975175779. The cubic root of 86778494 is about 442.7283875337.

It can be divided in two parts, 8677 and 8494, that added together give a palindrome (17171).

The spelling of 86778494 in words is "eighty-six million, seven hundred seventy-eight thousand, four hundred ninety-four".