72214440 has 96 divisors (see below), whose sum is σ = 228782880. Its totient is φ = 18232704.

The previous prime is 72214403. The next prime is 72214451. The reversal of 72214440 is 4441227.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 72214440.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42487 + ... + 44153.

It is an arithmetic number, because the mean of its divisors is an integer number (2383155).

Almost surely, 2^72214440 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 72214440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114391440).

72214440 is an abundant number, since it is smaller than the sum of its proper divisors (156568440).

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

72214440 is a wasteful number, since it uses less digits than its factorization.

72214440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1719 (or 1696 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 24.

The square root of 72214440 is about 8497.9079778496. The cubic root of 72214440 is about 416.4293674572.

Adding to 72214440 its reverse (4441227), we get a palindrome (76655667).

The spelling of 72214440 in words is "seventy-two million, two hundred fourteen thousand, four hundred forty".