72457582 has 4 divisors (see below), whose sum is σ = 108686376. Its totient is φ = 36228790.

The previous prime is 72457579. The next prime is 72457591. The reversal of 72457582 is 28575427.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28575427 = 53 ⋅539159.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18114394 + ... + 18114397.

It is an arithmetic number, because the mean of its divisors is an integer number (27171594).

Almost surely, 2^72457582 is an apocalyptic number.

72457582 is a deficient number, since it is larger than the sum of its proper divisors (36228794).

72457582 is a wasteful number, since it uses less digits than its factorization.

72457582 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36228793.

The product of its digits is 156800, while the sum is 40.

The square root of 72457582 is about 8512.2019477924. The cubic root of 72457582 is about 416.8962087396.

The spelling of 72457582 in words is "seventy-two million, four hundred fifty-seven thousand, five hundred eighty-two".