72239618 has 8 divisors (see below), whose sum is σ = 118210320. Its totient is φ = 32836180.

The previous prime is 72239617. The next prime is 72239621. The reversal of 72239618 is 81693227.

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 (72239617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1641788 + ... + 1641831.

It is an arithmetic number, because the mean of its divisors is an integer number (14776290).

Almost surely, 2^72239618 is an apocalyptic number.

72239618 is a deficient number, since it is larger than the sum of its proper divisors (45970702).

72239618 is a wasteful number, since it uses less digits than its factorization.

72239618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3283632.

The product of its digits is 36288, while the sum is 38.

The square root of 72239618 is about 8499.3892721771. The cubic root of 72239618 is about 416.4777587038.

The spelling of 72239618 in words is "seventy-two million, two hundred thirty-nine thousand, six hundred eighteen".