72781162 has 8 divisors (see below), whose sum is σ = 110801376. Its totient is φ = 35847372.

The previous prime is 72781157. The next prime is 72781171. The reversal of 72781162 is 26118727.

It is a happy number.

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

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, 271438 + ... + 271705.

It is an arithmetic number, because the mean of its divisors is an integer number (13850172).

Almost surely, 2^72781162 is an apocalyptic number.

72781162 is a deficient number, since it is larger than the sum of its proper divisors (38020214).

72781162 is a wasteful number, since it uses less digits than its factorization.

72781162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543212.

The product of its digits is 9408, while the sum is 34.

The square root of 72781162 is about 8531.1876078305. The cubic root of 72781162 is about 417.5158768628.

Adding to 72781162 its reverse (26118727), we get a palindrome (98899889).

The spelling of 72781162 in words is "seventy-two million, seven hundred eighty-one thousand, one hundred sixty-two".