7888561 has 4 divisors (see below), whose sum is σ = 8352612. Its totient is φ = 7424512.

The previous prime is 7888547. The next prime is 7888567. The reversal of 7888561 is 1658887.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1658887 = 29 ⋅57203.

It can be written as a sum of positive squares in 2 ways, for example, as 4124961 + 3763600 = 2031^2 + 1940^2 .

It is a de Polignac number, because none of the positive numbers 2^k-7888561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7888567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232000 + ... + 232033.

It is an arithmetic number, because the mean of its divisors is an integer number (2088153).

Almost surely, 2^7888561 is an apocalyptic number.

It is an amenable number.

7888561 is a deficient number, since it is larger than the sum of its proper divisors (464051).

7888561 is a wasteful number, since it uses less digits than its factorization.

7888561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464050.

The product of its digits is 107520, while the sum is 43.

The square root of 7888561 is about 2808.6582205744. The cubic root of 7888561 is about 199.0669959520.

The spelling of 7888561 in words is "seven million, eight hundred eighty-eight thousand, five hundred sixty-one".