72031474 has 8 divisors (see below), whose sum is σ = 108596268. Its totient is φ = 35832720.

The previous prime is 72031471. The next prime is 72031513. The reversal of 72031474 is 47413027.

It can be written as a sum of positive squares in 2 ways, for example, as 67125249 + 4906225 = 8193^2 + 2215^2 .

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

It is a super-2 number, since 2×72031474² = 10377066493225352, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72031471) by changing a digit.

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, 91017 + ... + 91804.

Almost surely, 2^72031474 is an apocalyptic number.

72031474 is a deficient number, since it is larger than the sum of its proper divisors (36564794).

72031474 is a wasteful number, since it uses less digits than its factorization.

72031474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183020.

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 72031474 is about 8487.1357948368. The cubic root of 72031474 is about 416.0773748150.

The spelling of 72031474 in words is "seventy-two million, thirty-one thousand, four hundred seventy-four".