72143526 has 64 divisors (see below), whose sum is σ = 180182016. Its totient is φ = 18748800.

The previous prime is 72143507. The next prime is 72143527. The reversal of 72143526 is 62534127.

It is a junction number, because it is equal to n+sod(n) for n = 72143493 and 72143502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72143527) 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, 37836 + ... + 39696.

It is an arithmetic number, because the mean of its divisors is an integer number (2815344).

Almost surely, 2^72143526 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72143526, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90091008).

72143526 is an abundant number, since it is smaller than the sum of its proper divisors (108038490).

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

72143526 is a wasteful number, since it uses less digits than its factorization.

72143526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1957.

The product of its digits is 10080, while the sum is 30.

The square root of 72143526 is about 8493.7345143347. The cubic root of 72143526 is about 416.2930127165.

The spelling of 72143526 in words is "seventy-two million, one hundred forty-three thousand, five hundred twenty-six".