68531888 has 20 divisors (see below), whose sum is σ = 134764440. Its totient is φ = 33753984.

The previous prime is 68531873. The next prime is 68531891. The reversal of 68531888 is 88813586.

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, 30893 + ... + 33036.

It is an arithmetic number, because the mean of its divisors is an integer number (6738222).

Almost surely, 2^68531888 is an apocalyptic number.

It is an amenable number.

68531888 is a deficient number, since it is larger than the sum of its proper divisors (66232552).

68531888 is a wasteful number, since it uses less digits than its factorization.

68531888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64004 (or 63998 counting only the distinct ones).

The product of its digits is 368640, while the sum is 47.

The square root of 68531888 is about 8278.3988790104. The cubic root of 68531888 is about 409.2269550184.

The spelling of 68531888 in words is "sixty-eight million, five hundred thirty-one thousand, eight hundred eighty-eight".