72341440 has 56 divisors (see below), whose sum is σ = 179771040. Its totient is φ = 27675648.

The previous prime is 72341429. The next prime is 72341453. The reversal of 72341440 is 4414327.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2446 + ... + 12274.

Almost surely, 2^72341440 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 72341440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89885520).

72341440 is an abundant number, since it is smaller than the sum of its proper divisors (107429600).

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

72341440 is a wasteful number, since it uses less digits than its factorization.

72341440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9869 (or 9859 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 72341440 is about 8505.3771227383. The cubic root of 72341440 is about 416.6733424708.

Adding to 72341440 its reverse (4414327), we get a palindrome (76755767).

The spelling of 72341440 in words is "seventy-two million, three hundred forty-one thousand, four hundred forty".