78438382 has 8 divisors (see below), whose sum is σ = 128353752. Its totient is φ = 35653800.

The previous prime is 78438379. The next prime is 78438419. The reversal of 78438382 is 28383487.

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

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, 1782669 + ... + 1782712.

It is an arithmetic number, because the mean of its divisors is an integer number (16044219).

Almost surely, 2^78438382 is an apocalyptic number.

78438382 is a deficient number, since it is larger than the sum of its proper divisors (49915370).

78438382 is a wasteful number, since it uses less digits than its factorization.

78438382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3565394.

The product of its digits is 258048, while the sum is 43.

The square root of 78438382 is about 8856.5445857851. The cubic root of 78438382 is about 428.0648248101.

The spelling of 78438382 in words is "seventy-eight million, four hundred thirty-eight thousand, three hundred eighty-two".