72285534 has 40 divisors (see below), whose sum is σ = 165048840. Its totient is φ = 23637744.

The previous prime is 72285497. The next prime is 72285539. The reversal of 72285534 is 43558227.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72285539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4377 + ... + 12795.

It is an arithmetic number, because the mean of its divisors is an integer number (4126221).

Almost surely, 2^72285534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72285534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82524420).

72285534 is an abundant number, since it is smaller than the sum of its proper divisors (92763306).

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

72285534 is a wasteful number, since it uses less digits than its factorization.

72285534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8486 (or 8477 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 72285534 is about 8502.0899783524. The cubic root of 72285534 is about 416.5659787284.

The spelling of 72285534 in words is "seventy-two million, two hundred eighty-five thousand, five hundred thirty-four".