78083638 has 8 divisors (see below), whose sum is σ = 119617632. Its totient is φ = 38211096.

The previous prime is 78083611. The next prime is 78083641. The reversal of 78083638 is 83638087.

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 = 78083594 and 78083603.

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, 415245 + ... + 415432.

It is an arithmetic number, because the mean of its divisors is an integer number (14952204).

Almost surely, 2^78083638 is an apocalyptic number.

78083638 is a deficient number, since it is larger than the sum of its proper divisors (41533994).

78083638 is a wasteful number, since it uses less digits than its factorization.

78083638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830726.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 78083638 is about 8836.4946670046. The cubic root of 78083638 is about 427.4185301244.

The spelling of 78083638 in words is "seventy-eight million, eighty-three thousand, six hundred thirty-eight".