7957881 has 12 divisors (see below), whose sum is σ = 11762608. Its totient is φ = 5181624.

The previous prime is 7957879. The next prime is 7957909. The reversal of 7957881 is 1887597.

7957881 is a `hidden beast` number, since 79 + 578 + 8 + 1 = 666.

It is not a de Polignac number, because 7957881 - 2¹ = 7957879 is a prime.

It is a super-2 number, since 2×7957881² = 126655740020322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7957801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9895 + ... + 10668.

Almost surely, 2^7957881 is an apocalyptic number.

It is an amenable number.

7957881 is a deficient number, since it is larger than the sum of its proper divisors (3804727).

7957881 is a wasteful number, since it uses less digits than its factorization.

7957881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20612 (or 20609 counting only the distinct ones).

The product of its digits is 141120, while the sum is 45.

The square root of 7957881 is about 2820.9716411194. The cubic root of 7957881 is about 199.6483905495.

The spelling of 7957881 in words is "seven million, nine hundred fifty-seven thousand, eight hundred eighty-one".