7978194 has 48 divisors (see below), whose sum is σ = 20621952. Its totient is φ = 2179584.

The previous prime is 7978193. The next prime is 7978207. The reversal of 7978194 is 4918797.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (7978193) 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, 1522 + ... + 4274.

It is an arithmetic number, because the mean of its divisors is an integer number (429624).

Almost surely, 2^7978194 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7978194, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10310976).

7978194 is an abundant number, since it is smaller than the sum of its proper divisors (12643758).

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

7978194 is a wasteful number, since it uses less digits than its factorization.

7978194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2791 (or 2788 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 7978194 is about 2824.5697017422. The cubic root of 7978194 is about 199.8181179781.

The spelling of 7978194 in words is "seven million, nine hundred seventy-eight thousand, one hundred ninety-four".