72211740 has 96 divisors (see below), whose sum is σ = 213857280. Its totient is φ = 18176256.

The previous prime is 72211721. The next prime is 72211759. The reversal of 72211740 is 4711227.

It is an interprime number because it is at equal distance from previous prime (72211721) and next prime (72211759).

It is a self number, because there is not a number n which added to its sum of digits gives 72211740.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81339 + ... + 82221.

It is an arithmetic number, because the mean of its divisors is an integer number (2227680).

Almost surely, 2^72211740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72211740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106928640).

72211740 is an abundant number, since it is smaller than the sum of its proper divisors (141645540).

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

72211740 is a wasteful number, since it uses less digits than its factorization.

72211740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971 (or 969 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 24.

The square root of 72211740 is about 8497.7491137359. The cubic root of 72211740 is about 416.4241774827.

Adding to 72211740 its reverse (4711227), we get a palindrome (76922967).

The spelling of 72211740 in words is "seventy-two million, two hundred eleven thousand, seven hundred forty".