72085728 has 192 divisors, whose sum is σ = 228614400. Its totient is φ = 19599360.

The previous prime is 72085721. The next prime is 72085771. The reversal of 72085728 is 82758027.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72085721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 809908 + ... + 809996.

It is an arithmetic number, because the mean of its divisors is an integer number (1190700).

Almost surely, 2^72085728 is an apocalyptic number.

72085728 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72085728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114307200).

72085728 is an abundant number, since it is smaller than the sum of its proper divisors (156528672).

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

72085728 is a wasteful number, since it uses less digits than its factorization.

72085728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 39.

The square root of 72085728 is about 8490.3314422936. The cubic root of 72085728 is about 416.1818115539.

The spelling of 72085728 in words is "seventy-two million, eighty-five thousand, seven hundred twenty-eight".