72168734 has 16 divisors (see below), whose sum is σ = 120032496. Its totient is φ = 32265600.

The previous prime is 72168727. The next prime is 72168751. The reversal of 72168734 is 43786127.

It is a Curzon number.

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 7 ways as a sum of consecutive naturals, for example, 25547 + ... + 28230.

It is an arithmetic number, because the mean of its divisors is an integer number (7502031).

Almost surely, 2^72168734 is an apocalyptic number.

72168734 is a deficient number, since it is larger than the sum of its proper divisors (47863762).

72168734 is a wasteful number, since it uses less digits than its factorization.

72168734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53851.

The product of its digits is 56448, while the sum is 38.

The square root of 72168734 is about 8495.2183020803. The cubic root of 72168734 is about 416.3414933534.

The spelling of 72168734 in words is "seventy-two million, one hundred sixty-eight thousand, seven hundred thirty-four".