78994426 has 8 divisors (see below), whose sum is σ = 135419040. Its totient is φ = 33854748.

The previous prime is 78994403. The next prime is 78994453. The reversal of 78994426 is 62449987.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 78994426.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2821216 + ... + 2821243.

It is an arithmetic number, because the mean of its divisors is an integer number (16927380).

Almost surely, 2^78994426 is an apocalyptic number.

78994426 is a deficient number, since it is larger than the sum of its proper divisors (56424614).

78994426 is a wasteful number, since it uses less digits than its factorization.

78994426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5642468.

The product of its digits is 870912, while the sum is 49.

The square root of 78994426 is about 8887.8808497864. The cubic root of 78994426 is about 429.0739508431.

The spelling of 78994426 in words is "seventy-eight million, nine hundred ninety-four thousand, four hundred twenty-six".