78671516 has 48 divisors (see below), whose sum is σ = 174048000. Its totient is φ = 30222720.

The previous prime is 78671507. The next prime is 78671543. The reversal of 78671516 is 61517687.

It is a congruent number.

It is an unprimeable number.

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, 20735 + ... + 24233.

It is an arithmetic number, because the mean of its divisors is an integer number (3626000).

Almost surely, 2^78671516 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78671516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87024000).

78671516 is an abundant number, since it is smaller than the sum of its proper divisors (95376484).

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

78671516 is a wasteful number, since it uses less digits than its factorization.

78671516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3594 (or 3592 counting only the distinct ones).

The product of its digits is 70560, while the sum is 41.

The square root of 78671516 is about 8869.6964998809. The cubic root of 78671516 is about 428.4885024103.

The spelling of 78671516 in words is "seventy-eight million, six hundred seventy-one thousand, five hundred sixteen".