78138116 has 12 divisors (see below), whose sum is σ = 156276288. Its totient is φ = 33487752.

The previous prime is 78138101. The next prime is 78138139. The reversal of 78138116 is 61183187.

78138116 is an admirable number.

It is a super-2 number, since 2×78138116² = 12211130344058912, which contains 22 as substring.

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, 1395296 + ... + 1395351.

It is an arithmetic number, because the mean of its divisors is an integer number (13023024).

Almost surely, 2^78138116 is an apocalyptic number.

It is an amenable number.

78138116 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

78138116 is a wasteful number, since it uses less digits than its factorization.

78138116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2790658 (or 2790656 counting only the distinct ones).

The product of its digits is 8064, while the sum is 35.

The square root of 78138116 is about 8839.5766866972. The cubic root of 78138116 is about 427.5179085780.

The spelling of 78138116 in words is "seventy-eight million, one hundred thirty-eight thousand, one hundred sixteen".