72034138 has 8 divisors (see below), whose sum is σ = 117874080. Its totient is φ = 32742780.

The previous prime is 72034121. The next prime is 72034139. The reversal of 72034138 is 83143027.

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 (72034139) 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, 1637118 + ... + 1637161.

It is an arithmetic number, because the mean of its divisors is an integer number (14734260).

Almost surely, 2^72034138 is an apocalyptic number.

72034138 is a deficient number, since it is larger than the sum of its proper divisors (45839942).

72034138 is a wasteful number, since it uses less digits than its factorization.

72034138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3274292.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 72034138 is about 8487.2927367919. The cubic root of 72034138 is about 416.0825041304.

Subtracting 72034138 from its reverse (83143027), we obtain a square (11108889 = 3333²).

The spelling of 72034138 in words is "seventy-two million, thirty-four thousand, one hundred thirty-eight".