78638041 has 8 divisors (see below), whose sum is σ = 83155968. Its totient is φ = 74244000.

The previous prime is 78638033. The next prime is 78638047. The reversal of 78638041 is 14083687.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 78638041 - 2³ = 78638033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78638047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29665 + ... + 32206.

It is an arithmetic number, because the mean of its divisors is an integer number (10394496).

Almost surely, 2^78638041 is an apocalyptic number.

It is an amenable number.

78638041 is a deficient number, since it is larger than the sum of its proper divisors (4517927).

78638041 is a wasteful number, since it uses less digits than its factorization.

78638041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61943.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 78638041 is about 8867.8092559549. The cubic root of 78638041 is about 428.4277193457.

The spelling of 78638041 in words is "seventy-eight million, six hundred thirty-eight thousand, forty-one".