78426416 has 20 divisors (see below), whose sum is σ = 152594400. Its totient is φ = 39047232.

The previous prime is 78426401. The next prime is 78426473. The reversal of 78426416 is 61462487.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 78426416.

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 3 ways as a sum of consecutive naturals, for example, 6431 + ... + 14078.

It is an arithmetic number, because the mean of its divisors is an integer number (7629720).

Almost surely, 2^78426416 is an apocalyptic number.

It is an amenable number.

78426416 is a deficient number, since it is larger than the sum of its proper divisors (74167984).

78426416 is a wasteful number, since it uses less digits than its factorization.

78426416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20756 (or 20750 counting only the distinct ones).

The product of its digits is 64512, while the sum is 38.

The square root of 78426416 is about 8855.8690143881. The cubic root of 78426416 is about 428.0430561978.

The spelling of 78426416 in words is "seventy-eight million, four hundred twenty-six thousand, four hundred sixteen".