72205336 has 16 divisors (see below), whose sum is σ = 154725840. Its totient is φ = 30945120.

The previous prime is 72205319. The next prime is 72205337. The reversal of 72205336 is 63350227.

It is a super-2 number, since 2×72205336² = 10427221093745792, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72205337) 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, 644635 + ... + 644746.

It is an arithmetic number, because the mean of its divisors is an integer number (9670365).

Almost surely, 2^72205336 is an apocalyptic number.

It is an amenable number.

72205336 is an abundant number, since it is smaller than the sum of its proper divisors (82520504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72205336 is a wasteful number, since it uses less digits than its factorization.

72205336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289394 (or 1289390 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 28.

The square root of 72205336 is about 8497.3722997171. The cubic root of 72205336 is about 416.4118671148.

The spelling of 72205336 in words is "seventy-two million, two hundred five thousand, three hundred thirty-six".