72205244 has 36 divisors (see below), whose sum is σ = 138360600. Its totient is φ = 32840640.

The previous prime is 72205219. The next prime is 72205247. The reversal of 72205244 is 44250227.

It is a super-2 number, since 2×72205244² = 10427194522199072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72205247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 398834 + ... + 399014.

It is an arithmetic number, because the mean of its divisors is an integer number (3843350).

Almost surely, 2^72205244 is an apocalyptic number.

It is an amenable number.

72205244 is a deficient number, since it is larger than the sum of its proper divisors (66155356).

72205244 is a wasteful number, since it uses less digits than its factorization.

72205244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414 (or 231 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 26.

The square root of 72205244 is about 8497.3668862772. The cubic root of 72205244 is about 416.4116902585.

The spelling of 72205244 in words is "seventy-two million, two hundred five thousand, two hundred forty-four".