7840394116 has 9 divisors (see below), whose sum is σ = 13720999621. Its totient is φ = 3920108512.

The previous prime is 7840394113. The next prime is 7840394129. The reversal of 7840394116 is 6114930487.

The square root of 7840394116 is 88546.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 529460100 + 7310934016 = 23010^2 + 85504^2 .

It is a super-2 number, since 2×7840394116² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7840394113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 154956 + ... + 199228.

Almost surely, 2^7840394116 is an apocalyptic number.

7840394116 is the 88546-th square number.

It is an amenable number.

7840394116 is a deficient number, since it is larger than the sum of its proper divisors (5880605505).

7840394116 is an frugal number, since it uses more digits than its factorization.

7840394116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88550 (or 44275 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The cubic root of 7840394116 is about 1986.6100645380.

It can be divided in two parts, 7840 and 394116, that added together give a square (401956 = 634²).

The spelling of 7840394116 in words is "seven billion, eight hundred forty million, three hundred ninety-four thousand, one hundred sixteen".