72274247228 has 12 divisors (see below), whose sum is σ = 127115511600. Its totient is φ = 35955529632.

The previous prime is 72274247203. The next prime is 72274247233. The reversal of 72274247228 is 82274247227.

It is a happy number.

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, 45397601 + ... + 45399192.

It is an arithmetic number, because the mean of its divisors is an integer number (10592959300).

Almost surely, 2^72274247228 is an apocalyptic number.

It is an amenable number.

72274247228 is a deficient number, since it is larger than the sum of its proper divisors (54841264372).

72274247228 is a wasteful number, since it uses less digits than its factorization.

72274247228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90796996 (or 90796994 counting only the distinct ones).

The product of its digits is 1404928, while the sum is 47.

Subtracting 72274247228 from its reverse (82274247227), we obtain a palindrome (9999999999).

The spelling of 72274247228 in words is "seventy-two billion, two hundred seventy-four million, two hundred forty-seven thousand, two hundred twenty-eight".