7798618 has 4 divisors (see below), whose sum is σ = 11697930. Its totient is φ = 3899308.

The previous prime is 7798613. The next prime is 7798619. The reversal of 7798618 is 8168977.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8168977 = 1181 ⋅6917.

It can be written as a sum of positive squares in only one way, i.e., 4986289 + 2812329 = 2233^2 + 1677^2 .

It is not an unprimeable number, because it can be changed into a prime (7798613) 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 as a sum of consecutive naturals, namely, 1949653 + ... + 1949656.

Almost surely, 2^7798618 is an apocalyptic number.

7798618 is a deficient number, since it is larger than the sum of its proper divisors (3899312).

7798618 is a wasteful number, since it uses less digits than its factorization.

7798618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3899311.

The product of its digits is 169344, while the sum is 46.

The square root of 7798618 is about 2792.6005801045. The cubic root of 7798618 is about 198.3075348754.

The spelling of 7798618 in words is "seven million, seven hundred ninety-eight thousand, six hundred eighteen".