7979885 has 16 divisors (see below), whose sum is σ = 10206000. Its totient is φ = 5968896.

The previous prime is 7979863. The next prime is 7979891. The reversal of 7979885 is 5889797.

7979885 is nontrivially palindromic in base 4.

It can be written as a sum of positive squares in 8 ways, for example, as 33124 + 7946761 = 182^2 + 2819^2 .

It is a cyclic number.

It is not a de Polignac number, because 7979885 - 2⁶ = 7979821 is a prime.

It is a super-2 number, since 2×7979885² = 127357129226450, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22691 + ... + 23039.

It is an arithmetic number, because the mean of its divisors is an integer number (637875).

Almost surely, 2^7979885 is an apocalyptic number.

It is an amenable number.

7979885 is a deficient number, since it is larger than the sum of its proper divisors (2226115).

7979885 is a wasteful number, since it uses less digits than its factorization.

7979885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640.

The product of its digits is 1270080, while the sum is 53.

The square root of 7979885 is about 2824.8690235124. The cubic root of 7979885 is about 199.8322343127.

The spelling of 7979885 in words is "seven million, nine hundred seventy-nine thousand, eight hundred eighty-five".