7688427 has 4 divisors (see below), whose sum is σ = 10251240. Its totient is φ = 5125616.

The previous prime is 7688419. The next prime is 7688431. The reversal of 7688427 is 7248867.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7248867 = 3 ⋅2416289.

It is a cyclic number.

It is not a de Polignac number, because 7688427 - 2³ = 7688419 is a prime.

It is a super-2 number, since 2×7688427² = 118223819468658, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7688497) 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, 1281402 + ... + 1281407.

It is an arithmetic number, because the mean of its divisors is an integer number (2562810).

Almost surely, 2^7688427 is an apocalyptic number.

7688427 is a deficient number, since it is larger than the sum of its proper divisors (2562813).

7688427 is a wasteful number, since it uses less digits than its factorization.

7688427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2562812.

The product of its digits is 150528, while the sum is 42.

The square root of 7688427 is about 2772.8012911134. The cubic root of 7688427 is about 197.3691019616.

It can be divided in two parts, 768 and 8427, that multiplied together give a square (6471936 = 2544²).

The spelling of 7688427 in words is "seven million, six hundred eighty-eight thousand, four hundred twenty-seven".