68129740 has 24 divisors (see below), whose sum is σ = 163511712. Its totient is φ = 23358720.

The previous prime is 68129669. The next prime is 68129777. The reversal of 68129740 is 4792186.

It is a super-2 number, since 2×68129740² = 9283322944935200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68129740.

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 7 ways as a sum of consecutive naturals, for example, 243181 + ... + 243460.

It is an arithmetic number, because the mean of its divisors is an integer number (6812988).

Almost surely, 2^68129740 is an apocalyptic number.

It is an amenable number.

68129740 is an abundant number, since it is smaller than the sum of its proper divisors (95381972).

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

68129740 is a wasteful number, since it uses less digits than its factorization.

68129740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486657 (or 486655 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 68129740 is about 8254.0741455356. The cubic root of 68129740 is about 408.4249305366.

The spelling of 68129740 in words is "sixty-eight million, one hundred twenty-nine thousand, seven hundred forty".