72026618 has 8 divisors (see below), whose sum is σ = 109520148. Its totient is φ = 35519904.

The previous prime is 72026611. The next prime is 72026659. The reversal of 72026618 is 81662027.

It can be written as a sum of positive squares in 2 ways, for example, as 61418569 + 10608049 = 7837^2 + 3257^2 .

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 (72026611) 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, 246521 + ... + 246812.

Almost surely, 2^72026618 is an apocalyptic number.

72026618 is a deficient number, since it is larger than the sum of its proper divisors (37493530).

72026618 is a wasteful number, since it uses less digits than its factorization.

72026618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493408.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 72026618 is about 8486.8497099925. The cubic root of 72026618 is about 416.0680246563.

The spelling of 72026618 in words is "seventy-two million, twenty-six thousand, six hundred eighteen".