7718994 has 12 divisors (see below), whose sum is σ = 16724526. Its totient is φ = 2572992.

The previous prime is 7718993. The next prime is 7719067. The reversal of 7718994 is 4998177.

It can be written as a sum of positive squares in only one way, i.e., 6426225 + 1292769 = 2535^2 + 1137^2 .

It is not an unprimeable number, because it can be changed into a prime (7718993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 214399 + ... + 214434.

Almost surely, 2^7718994 is an apocalyptic number.

7718994 is an abundant number, since it is smaller than the sum of its proper divisors (9005532).

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

7718994 is a wasteful number, since it uses less digits than its factorization.

7718994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428841 (or 428838 counting only the distinct ones).

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

The square root of 7718994 is about 2778.3077583306. The cubic root of 7718994 is about 197.6303172407.

It can be divided in two parts, 771899 and 4, that added together give a triangular number (771903 = T₁₂₄₂).

The spelling of 7718994 in words is "seven million, seven hundred eighteen thousand, nine hundred ninety-four".