7881136 has 20 divisors (see below), whose sum is σ = 15413200. Its totient is φ = 3903552.

The previous prime is 7881113. The next prime is 7881151. The reversal of 7881136 is 6311887.

It is a super-2 number, since 2×7881136² = 124224609300992, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 516 + ... + 4003.

It is an arithmetic number, because the mean of its divisors is an integer number (770660).

Almost surely, 2^7881136 is an apocalyptic number.

It is an amenable number.

7881136 is a deficient number, since it is larger than the sum of its proper divisors (7532064).

7881136 is a wasteful number, since it uses less digits than its factorization.

7881136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4636 (or 4630 counting only the distinct ones).

The product of its digits is 8064, while the sum is 34.

The square root of 7881136 is about 2807.3361038536. The cubic root of 7881136 is about 199.0045199852.

The spelling of 7881136 in words is "seven million, eight hundred eighty-one thousand, one hundred thirty-six".