72425440 has 48 divisors (see below), whose sum is σ = 181176912. Its totient is φ = 27265024.

The previous prime is 72425371. The next prime is 72425477. The reversal of 72425440 is 4452427.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 72425399 and 72425408.

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, 10594 + ... + 16033.

It is an arithmetic number, because the mean of its divisors is an integer number (3774519).

Almost surely, 2^72425440 is an apocalyptic number.

It is an amenable number.

72425440 is an abundant number, since it is smaller than the sum of its proper divisors (108751472).

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

72425440 is a wasteful number, since it uses less digits than its factorization.

72425440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26659 (or 26651 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 28.

The square root of 72425440 is about 8510.3137427477. The cubic root of 72425440 is about 416.8345549212.

Adding to 72425440 its reverse (4452427), we get a palindrome (76877867).

The spelling of 72425440 in words is "seventy-two million, four hundred twenty-five thousand, four hundred forty".