72081346 has 8 divisors (see below), whose sum is σ = 108586764. Its totient is φ = 35885760.

The previous prime is 72081329. The next prime is 72081349. The reversal of 72081346 is 64318027.

It can be written as a sum of positive squares in 2 ways, for example, as 72063121 + 18225 = 8489^2 + 135^2 .

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

It is not an unprimeable number, because it can be changed into a prime (72081349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76875 + ... + 77806.

Almost surely, 2^72081346 is an apocalyptic number.

72081346 is a deficient number, since it is larger than the sum of its proper divisors (36505418).

72081346 is a wasteful number, since it uses less digits than its factorization.

72081346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154916.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 72081346 is about 8490.0733801305. The cubic root of 72081346 is about 416.1733783281.

It can be divided in two parts, 72081 and 346, that added together give a palindrome (72427).

The spelling of 72081346 in words is "seventy-two million, eighty-one thousand, three hundred forty-six".