68131388 has 48 divisors (see below), whose sum is σ = 133574784. Its totient is φ = 30205440.

The previous prime is 68131373. The next prime is 68131409. The reversal of 68131388 is 88313186.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 148856 + ... + 149312.

It is an arithmetic number, because the mean of its divisors is an integer number (2782808).

Almost surely, 2^68131388 is an apocalyptic number.

It is an amenable number.

68131388 is a deficient number, since it is larger than the sum of its proper divisors (65443396).

68131388 is a wasteful number, since it uses less digits than its factorization.

68131388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582 (or 580 counting only the distinct ones).

The product of its digits is 27648, while the sum is 38.

The square root of 68131388 is about 8254.1739744205. The cubic root of 68131388 is about 408.4282236597.

The spelling of 68131388 in words is "sixty-eight million, one hundred thirty-one thousand, three hundred eighty-eight".