72404340 has 48 divisors (see below), whose sum is σ = 204610560. Its totient is φ = 19128960.

The previous prime is 72404323. The next prime is 72404341. The reversal of 72404340 is 4340427.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 72404340.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72404341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1005 + ... + 12075.

It is an arithmetic number, because the mean of its divisors is an integer number (4262720).

Almost surely, 2^72404340 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 72404340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102305280).

72404340 is an abundant number, since it is smaller than the sum of its proper divisors (132206220).

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

72404340 is a wasteful number, since it uses less digits than its factorization.

72404340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11192 (or 11190 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 24.

The square root of 72404340 is about 8509.0739801696. The cubic root of 72404340 is about 416.7940716170.

Adding to 72404340 its reverse (4340427), we get a palindrome (76744767).

The spelling of 72404340 in words is "seventy-two million, four hundred four thousand, three hundred forty".