72222044 has 6 divisors (see below), whose sum is σ = 126388584. Its totient is φ = 36111020.

The previous prime is 72222043. The next prime is 72222049. The reversal of 72222044 is 44022227.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72222043) by changing a digit.

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 as a sum of consecutive naturals, namely, 9027752 + ... + 9027759.

It is an arithmetic number, because the mean of its divisors is an integer number (21064764).

Almost surely, 2^72222044 is an apocalyptic number.

It is an amenable number.

72222044 is a deficient number, since it is larger than the sum of its proper divisors (54166540).

72222044 is a wasteful number, since it uses less digits than its factorization.

72222044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18055515 (or 18055513 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 23.

The square root of 72222044 is about 8498.3553703055. The cubic root of 72222044 is about 416.4439832680.

The spelling of 72222044 in words is "seventy-two million, two hundred twenty-two thousand, forty-four".