68687456 has 12 divisors (see below), whose sum is σ = 135228492. Its totient is φ = 34343712.

The previous prime is 68687393. The next prime is 68687467. The reversal of 68687456 is 65478686.

It is a happy number.

It is a super-2 number, since 2×68687456² = 9435933223503872, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1073210 + ... + 1073273.

It is an arithmetic number, because the mean of its divisors is an integer number (11269041).

Almost surely, 2^68687456 is an apocalyptic number.

It is an amenable number.

68687456 is a deficient number, since it is larger than the sum of its proper divisors (66541036).

68687456 is a wasteful number, since it uses less digits than its factorization.

68687456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146493 (or 2146485 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 50.

The square root of 68687456 is about 8287.7895726183. The cubic root of 68687456 is about 409.5363706295.

The spelling of 68687456 in words is "sixty-eight million, six hundred eighty-seven thousand, four hundred fifty-six".