68889740 has 24 divisors (see below), whose sum is σ = 147042672. Its totient is φ = 27103680.

The previous prime is 68889739. The next prime is 68889749. The reversal of 68889740 is 4798886.

It is not an unprimeable number, because it can be changed into a prime (68889749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27014 + ... + 29453.

It is an arithmetic number, because the mean of its divisors is an integer number (6126778).

Almost surely, 2^68889740 is an apocalyptic number.

It is an amenable number.

68889740 is an abundant number, since it is smaller than the sum of its proper divisors (78152932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68889740 is a wasteful number, since it uses less digits than its factorization.

68889740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56537 (or 56535 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 50.

The square root of 68889740 is about 8299.9843373346. The cubic root of 68889740 is about 409.9380037134.

The spelling of 68889740 in words is "sixty-eight million, eight hundred eighty-nine thousand, seven hundred forty".