72143424 has 84 divisors (see below), whose sum is σ = 208026000. Its totient is φ = 23904000.

The previous prime is 72143413. The next prime is 72143431. The reversal of 72143424 is 42434127.

Its product of digits (5376) is a multiple of the sum of its prime factors (768).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 144327 + ... + 144825.

It is an arithmetic number, because the mean of its divisors is an integer number (2476500).

Almost surely, 2^72143424 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 72143424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104013000).

72143424 is an abundant number, since it is smaller than the sum of its proper divisors (135882576).

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

72143424 is a wasteful number, since it uses less digits than its factorization.

72143424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768 (or 755 counting only the distinct ones).

The product of its digits is 5376, while the sum is 27.

The square root of 72143424 is about 8493.7285099066. The cubic root of 72143424 is about 416.2928165247.

The spelling of 72143424 in words is "seventy-two million, one hundred forty-three thousand, four hundred twenty-four".