78427396 has 24 divisors (see below), whose sum is σ = 144700416. Its totient is φ = 37138560.

The previous prime is 78427387. The next prime is 78427403. The reversal of 78427396 is 69372487.

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 7 ways as a sum of consecutive naturals, for example, 901 + ... + 12556.

It is an arithmetic number, because the mean of its divisors is an integer number (6029184).

Almost surely, 2^78427396 is an apocalyptic number.

It is an amenable number.

78427396 is a deficient number, since it is larger than the sum of its proper divisors (66273020).

78427396 is a wasteful number, since it uses less digits than its factorization.

78427396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13539 (or 13537 counting only the distinct ones).

The product of its digits is 508032, while the sum is 46.

The square root of 78427396 is about 8855.9243447536. The cubic root of 78427396 is about 428.0448391023.

The spelling of 78427396 in words is "seventy-eight million, four hundred twenty-seven thousand, three hundred ninety-six".