78838956 has 72 divisors (see below), whose sum is σ = 229078304. Its totient is φ = 22394880.

The previous prime is 78838943. The next prime is 78838957. The reversal of 78838956 is 65983887.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (78838957) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47826 + ... + 49446.

Almost surely, 2^78838956 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78838956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114539152).

78838956 is an abundant number, since it is smaller than the sum of its proper divisors (150239348).

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

78838956 is a wasteful number, since it uses less digits than its factorization.

78838956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1831 (or 1826 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 78838956 is about 8879.1303628227. The cubic root of 78838956 is about 428.7922772218.

The spelling of 78838956 in words is "seventy-eight million, eight hundred thirty-eight thousand, nine hundred fifty-six".