68472138 has 32 divisors (see below), whose sum is σ = 159842304. Its totient is φ = 19146672.

The previous prime is 68472121. The next prime is 68472139. The reversal of 68472138 is 83127486.

It is a junction number, because it is equal to n+sod(n) for n = 68472096 and 68472105.

It is not an unprimeable number, because it can be changed into a prime (68472139) 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 15 ways as a sum of consecutive naturals, for example, 15370 + ... + 19317.

It is an arithmetic number, because the mean of its divisors is an integer number (4995072).

Almost surely, 2^68472138 is an apocalyptic number.

68472138 is an abundant number, since it is smaller than the sum of its proper divisors (91370166).

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

68472138 is a wasteful number, since it uses less digits than its factorization.

68472138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34746.

The product of its digits is 64512, while the sum is 39.

The square root of 68472138 is about 8274.7893024536. The cubic root of 68472138 is about 409.1079913226.

The spelling of 68472138 in words is "sixty-eight million, four hundred seventy-two thousand, one hundred thirty-eight".