72273240 has 96 divisors (see below), whose sum is σ = 252972720. Its totient is φ = 17789184.

The previous prime is 72273233. The next prime is 72273259. The reversal of 72273240 is 4237227.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3042 + ... + 12401.

Almost surely, 2^72273240 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 72273240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126486360).

72273240 is an abundant number, since it is smaller than the sum of its proper divisors (180699480).

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

72273240 is a wasteful number, since it uses less digits than its factorization.

72273240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15473 (or 15466 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 27.

The square root of 72273240 is about 8501.3669489089. The cubic root of 72273240 is about 416.5423614972.

The spelling of 72273240 in words is "seventy-two million, two hundred seventy-three thousand, two hundred forty".