78471516 has 12 divisors (see below), whose sum is σ = 183100232. Its totient is φ = 26157168.

The previous prime is 78471511. The next prime is 78471527. The reversal of 78471516 is 61517487.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78471511) 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 3 ways as a sum of consecutive naturals, for example, 3269635 + ... + 3269658.

Almost surely, 2^78471516 is an apocalyptic number.

It is an amenable number.

78471516 is an abundant number, since it is smaller than the sum of its proper divisors (104628716).

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

78471516 is a wasteful number, since it uses less digits than its factorization.

78471516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6539300 (or 6539298 counting only the distinct ones).

The product of its digits is 47040, while the sum is 39.

The square root of 78471516 is about 8858.4149823769. The cubic root of 78471516 is about 428.1250908128.

It can be divided in two parts, 78471 and 516, that added together give a palindrome (78987).

The spelling of 78471516 in words is "seventy-eight million, four hundred seventy-one thousand, five hundred sixteen".