78814192 has 40 divisors (see below), whose sum is σ = 161418240. Its totient is φ = 37202880.

The previous prime is 78814171. The next prime is 78814201. The reversal of 78814192 is 29141887.

It is a happy number.

It is a super-2 number, since 2×78814192² = 12423353721225728, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

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, 27717 + ... + 30427.

It is an arithmetic number, because the mean of its divisors is an integer number (4035456).

Almost surely, 2^78814192 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 78814192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80709120).

78814192 is an abundant number, since it is smaller than the sum of its proper divisors (82604048).

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

78814192 is a wasteful number, since it uses less digits than its factorization.

78814192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2821 (or 2815 counting only the distinct ones).

The product of its digits is 32256, while the sum is 40.

The square root of 78814192 is about 8877.7357473626. The cubic root of 78814192 is about 428.7473767289.

The spelling of 78814192 in words is "seventy-eight million, eight hundred fourteen thousand, one hundred ninety-two".