78741138 has 32 divisors (see below), whose sum is σ = 183657600. Its totient is φ = 22496880.

The previous prime is 78741109. The next prime is 78741139. The reversal of 78741138 is 83114787.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 78741096 and 78741105.

It is not an unprimeable number, because it can be changed into a prime (78741139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17073 + ... + 21188.

It is an arithmetic number, because the mean of its divisors is an integer number (5739300).

Almost surely, 2^78741138 is an apocalyptic number.

78741138 is an abundant number, since it is smaller than the sum of its proper divisors (104916462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78741138 is a wasteful number, since it uses less digits than its factorization.

78741138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38287 (or 38273 counting only the distinct ones).

The product of its digits is 37632, while the sum is 39.

The square root of 78741138 is about 8873.6203434675. The cubic root of 78741138 is about 428.6148650895.

The spelling of 78741138 in words is "seventy-eight million, seven hundred forty-one thousand, one hundred thirty-eight".