72536278 has 4 divisors (see below), whose sum is σ = 108804420. Its totient is φ = 36268138.

The previous prime is 72536251. The next prime is 72536291. The reversal of 72536278 is 87263527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87263527 = 13 ⋅6712579.

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 self number, because there is not a number n which added to its sum of digits gives 72536278.

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, 18134068 + ... + 18134071.

It is an arithmetic number, because the mean of its divisors is an integer number (27201105).

Almost surely, 2^72536278 is an apocalyptic number.

72536278 is a deficient number, since it is larger than the sum of its proper divisors (36268142).

72536278 is a wasteful number, since it uses less digits than its factorization.

72536278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36268141.

The product of its digits is 141120, while the sum is 40.

The square root of 72536278 is about 8516.8232340468. The cubic root of 72536278 is about 417.0470841102.

It can be divided in two parts, 7253 and 6278, that added together give a palindrome (13531).

The spelling of 72536278 in words is "seventy-two million, five hundred thirty-six thousand, two hundred seventy-eight".