7879988 has 6 divisors (see below), whose sum is σ = 13789986. Its totient is φ = 3939992.

The previous prime is 7879979. The next prime is 7879999. The reversal of 7879988 is 8899787.

It can be written as a sum of positive squares in only one way, i.e., 6492304 + 1387684 = 2548^2 + 1178^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984995 + ... + 985002.

It is an arithmetic number, because the mean of its divisors is an integer number (2298331).

Almost surely, 2^7879988 is an apocalyptic number.

It is an amenable number.

7879988 is a deficient number, since it is larger than the sum of its proper divisors (5909998).

7879988 is a wasteful number, since it uses less digits than its factorization.

7879988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1970001 (or 1969999 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 56.

The square root of 7879988 is about 2807.1316321113. The cubic root of 7879988 is about 198.9948568993.

It can be divided in two parts, 78799 and 88, that added together give a palindrome (78887).

The spelling of 7879988 in words is "seven million, eight hundred seventy-nine thousand, nine hundred eighty-eight".