72385920 has 256 divisors, whose sum is σ = 264384000. Its totient is φ = 18708480.

The previous prime is 72385913. The next prime is 72385921. The reversal of 72385920 is 2958327.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72385921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1019485 + ... + 1019555.

It is an arithmetic number, because the mean of its divisors is an integer number (1032750).

Almost surely, 2^72385920 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 72385920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132192000).

72385920 is an abundant number, since it is smaller than the sum of its proper divisors (191998080).

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

72385920 is a wasteful number, since it uses less digits than its factorization.

72385920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 72385920 is about 8507.9915373724. The cubic root of 72385920 is about 416.7587238374.

The spelling of 72385920 in words is "seventy-two million, three hundred eighty-five thousand, nine hundred twenty".