78586438 has 8 divisors (see below), whose sum is σ = 134719632. Its totient is φ = 33679896.

The previous prime is 78586429. The next prime is 78586481. The reversal of 78586438 is 83468587.

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 = 78586391 and 78586400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2806645 + ... + 2806672.

It is an arithmetic number, because the mean of its divisors is an integer number (16839954).

Almost surely, 2^78586438 is an apocalyptic number.

78586438 is a deficient number, since it is larger than the sum of its proper divisors (56133194).

78586438 is a wasteful number, since it uses less digits than its factorization.

78586438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5613326.

The product of its digits is 1290240, while the sum is 49.

The square root of 78586438 is about 8864.8992098049. The cubic root of 78586438 is about 428.3339861137. Note that the first 3 decimals are identical.

The spelling of 78586438 in words is "seventy-eight million, five hundred eighty-six thousand, four hundred thirty-eight".