78427516 has 24 divisors (see below), whose sum is σ = 150756480. Its totient is φ = 35533872.

The previous prime is 78427483. The next prime is 78427529. The reversal of 78427516 is 61572487.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20686 + ... + 24181.

It is an arithmetic number, because the mean of its divisors is an integer number (6281520).

Almost surely, 2^78427516 is an apocalyptic number.

78427516 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

78427516 is a deficient number, since it is larger than the sum of its proper divisors (72328964).

78427516 is a wasteful number, since it uses less digits than its factorization.

78427516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44913 (or 44911 counting only the distinct ones).

The product of its digits is 94080, while the sum is 40.

The square root of 78427516 is about 8855.9311198767. The cubic root of 78427516 is about 428.0450574162.

The spelling of 78427516 in words is "seventy-eight million, four hundred twenty-seven thousand, five hundred sixteen".