78694438 has 8 divisors (see below), whose sum is σ = 119658888. Its totient is φ = 38808144.

The previous prime is 78694417. The next prime is 78694439. The reversal of 78694438 is 83449687.

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

It is a junction number, because it is equal to n+sod(n) for n = 78694391 and 78694400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78694439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269356 + ... + 269647.

It is an arithmetic number, because the mean of its divisors is an integer number (14957361).

Almost surely, 2^78694438 is an apocalyptic number.

78694438 is a deficient number, since it is larger than the sum of its proper divisors (40964450).

78694438 is a wasteful number, since it uses less digits than its factorization.

78694438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539078.

The product of its digits is 1161216, while the sum is 49.

The square root of 78694438 is about 8870.9885582160. The cubic root of 78694438 is about 428.5301136575.

The spelling of 78694438 in words is "seventy-eight million, six hundred ninety-four thousand, four hundred thirty-eight".