78171104 has 48 divisors (see below), whose sum is σ = 169220016. Its totient is φ = 35251200.

The previous prime is 78171091. The next prime is 78171127. The reversal of 78171104 is 40117187.

It is a super-2 number, since 2×78171104² = 12221443001157632, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47414 + ... + 49034.

It is an arithmetic number, because the mean of its divisors is an integer number (3525417).

Almost surely, 2^78171104 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 78171104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84610008).

78171104 is an abundant number, since it is smaller than the sum of its proper divisors (91048912).

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

78171104 is a wasteful number, since it uses less digits than its factorization.

78171104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1779 (or 1771 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 29.

The square root of 78171104 is about 8841.4424162577. The cubic root of 78171104 is about 427.5780626458.

The spelling of 78171104 in words is "seventy-eight million, one hundred seventy-one thousand, one hundred four".