72271772 has 12 divisors (see below), whose sum is σ = 126842520. Its totient is φ = 36031056.

The previous prime is 72271769. The next prime is 72271789. The reversal of 72271772 is 27717227.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24647 + ... + 27422.

It is an arithmetic number, because the mean of its divisors is an integer number (10570210).

Almost surely, 2^72271772 is an apocalyptic number.

It is an amenable number.

72271772 is a deficient number, since it is larger than the sum of its proper divisors (54570748).

72271772 is a wasteful number, since it uses less digits than its factorization.

72271772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52420 (or 52418 counting only the distinct ones).

The product of its digits is 19208, while the sum is 35.

The square root of 72271772 is about 8501.2806094141. The cubic root of 72271772 is about 416.5395412356.

Adding to 72271772 its reverse (27717227), we get a palindrome (99988999).

The spelling of 72271772 in words is "seventy-two million, two hundred seventy-one thousand, seven hundred seventy-two".