78986427 has 16 divisors (see below), whose sum is σ = 115342080. Its totient is φ = 47781792.

The previous prime is 78986417. The next prime is 78986431. The reversal of 78986427 is 72468987.

It is not a de Polignac number, because 78986427 - 2¹¹ = 78984379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78986427.

It is not an unprimeable number, because it can be changed into a prime (78986417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14863 + ... + 19464.

It is an arithmetic number, because the mean of its divisors is an integer number (7208880).

Almost surely, 2^78986427 is an apocalyptic number.

78986427 is a deficient number, since it is larger than the sum of its proper divisors (36355653).

78986427 is a wasteful number, since it uses less digits than its factorization.

78986427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34402.

The product of its digits is 1354752, while the sum is 51.

The square root of 78986427 is about 8887.4308436128. The cubic root of 78986427 is about 429.0594676339.

The spelling of 78986427 in words is "seventy-eight million, nine hundred eighty-six thousand, four hundred twenty-seven".