78619414 has 4 divisors (see below), whose sum is σ = 117929124. Its totient is φ = 39309706.

The previous prime is 78619399. The next prime is 78619459. The reversal of 78619414 is 41491687.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41491687 = 19 ⋅2183773.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19654852 + ... + 19654855.

It is an arithmetic number, because the mean of its divisors is an integer number (29482281).

Almost surely, 2^78619414 is an apocalyptic number.

78619414 is a deficient number, since it is larger than the sum of its proper divisors (39309710).

78619414 is a wasteful number, since it uses less digits than its factorization.

78619414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39309709.

The product of its digits is 48384, while the sum is 40.

The square root of 78619414 is about 8866.7589343570. The cubic root of 78619414 is about 428.3938894367.

The spelling of 78619414 in words is "seventy-eight million, six hundred nineteen thousand, four hundred fourteen".