68431672 has 8 divisors (see below), whose sum is σ = 128309400. Its totient is φ = 34215832.

The previous prime is 68431669. The next prime is 68431697. The reversal of 68431672 is 27613486.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4276972 + ... + 4276987.

It is an arithmetic number, because the mean of its divisors is an integer number (16038675).

Almost surely, 2^68431672 is an apocalyptic number.

It is an amenable number.

68431672 is a deficient number, since it is larger than the sum of its proper divisors (59877728).

68431672 is a wasteful number, since it uses less digits than its factorization.

68431672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8553965 (or 8553961 counting only the distinct ones).

The product of its digits is 48384, while the sum is 37.

The square root of 68431672 is about 8272.3438033002. The cubic root of 68431672 is about 409.0273832253.

It can be divided in two parts, 6843 and 1672, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 68431672 in words is "sixty-eight million, four hundred thirty-one thousand, six hundred seventy-two".