78366486 has 32 divisors (see below), whose sum is σ = 171295488. Its totient is φ = 23703840.

The previous prime is 78366473. The next prime is 78366487. The reversal of 78366486 is 68466387.

It is a happy number.

It is a super-2 number, since 2×78366486² = 12282612255976392, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78366487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69600 + ... + 70716.

It is an arithmetic number, because the mean of its divisors is an integer number (5352984).

Almost surely, 2^78366486 is an apocalyptic number.

78366486 is an abundant number, since it is smaller than the sum of its proper divisors (92929002).

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

78366486 is a wasteful number, since it uses less digits than its factorization.

78366486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2196.

The product of its digits is 1161216, while the sum is 48.

The square root of 78366486 is about 8852.4847359371. The cubic root of 78366486 is about 427.9339978871.

Subtracting from 78366486 its reverse (68466387), we obtain a palindrome (9900099).

The spelling of 78366486 in words is "seventy-eight million, three hundred sixty-six thousand, four hundred eighty-six".