72518258 has 8 divisors (see below), whose sum is σ = 111430620. Its totient is φ = 35374720.

The previous prime is 72518249. The next prime is 72518279. The reversal of 72518258 is 85281527.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 72471169 + 47089 = 8513^2 + 217^2 .

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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 442103 + ... + 442266.

Almost surely, 2^72518258 is an apocalyptic number.

72518258 is a deficient number, since it is larger than the sum of its proper divisors (38912362).

72518258 is a wasteful number, since it uses less digits than its factorization.

72518258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884412.

The product of its digits is 44800, while the sum is 38.

The square root of 72518258 is about 8515.7652621476. The cubic root of 72518258 is about 417.0125459404.

The spelling of 72518258 in words is "seventy-two million, five hundred eighteen thousand, two hundred fifty-eight".