78787146 has 32 divisors (see below), whose sum is σ = 168073920. Its totient is φ = 24535296.

The previous prime is 78787133. The next prime is 78787157. The reversal of 78787146 is 64178787.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 78787095 and 78787104.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 11400 + ... + 16956.

It is an arithmetic number, because the mean of its divisors is an integer number (5252310).

Almost surely, 2^78787146 is an apocalyptic number.

78787146 is an abundant number, since it is smaller than the sum of its proper divisors (89286774).

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

78787146 is a wasteful number, since it uses less digits than its factorization.

78787146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5718.

The product of its digits is 526848, while the sum is 48.

The square root of 78787146 is about 8876.2123678966. The cubic root of 78787146 is about 428.6983279137.

The spelling of 78787146 in words is "seventy-eight million, seven hundred eighty-seven thousand, one hundred forty-six".