78861486 has 32 divisors (see below), whose sum is σ = 172378368. Its totient is φ = 23853440.

The previous prime is 78861481. The next prime is 78861499. The reversal of 78861486 is 68416887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78861481) 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, 63871 + ... + 65093.

It is an arithmetic number, because the mean of its divisors is an integer number (5386824).

Almost surely, 2^78861486 is an apocalyptic number.

78861486 is an abundant number, since it is smaller than the sum of its proper divisors (93516882).

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

78861486 is a wasteful number, since it uses less digits than its factorization.

78861486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2216.

The product of its digits is 516096, while the sum is 48.

The square root of 78861486 is about 8880.3989775235. The cubic root of 78861486 is about 428.8331190018.

The spelling of 78861486 in words is "seventy-eight million, eight hundred sixty-one thousand, four hundred eighty-six".