72781342 has 8 divisors (see below), whose sum is σ = 109208376. Its totient is φ = 36378552.

The previous prime is 72781339. The next prime is 72781391. The reversal of 72781342 is 24318727.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 72781298 and 72781307.

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 3 ways as a sum of consecutive naturals, for example, 7648 + ... + 14284.

It is an arithmetic number, because the mean of its divisors is an integer number (13651047).

Almost surely, 2^72781342 is an apocalyptic number.

72781342 is a deficient number, since it is larger than the sum of its proper divisors (36427034).

72781342 is a wasteful number, since it uses less digits than its factorization.

72781342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12122.

The product of its digits is 18816, while the sum is 34.

The square root of 72781342 is about 8531.1981573516. The cubic root of 72781342 is about 417.5162210581.

The spelling of 72781342 in words is "seventy-two million, seven hundred eighty-one thousand, three hundred forty-two".