72273424 has 10 divisors (see below), whose sum is σ = 140029790. Its totient is φ = 36136704.

The previous prime is 72273403. The next prime is 72273457. The reversal of 72273424 is 42437227.

It can be written as a sum of positive squares in only one way, i.e., 70023424 + 2250000 = 8368^2 + 1500^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2258529 + ... + 2258560.

It is an arithmetic number, because the mean of its divisors is an integer number (14002979).

Almost surely, 2^72273424 is an apocalyptic number.

It is an amenable number.

72273424 is a deficient number, since it is larger than the sum of its proper divisors (67756366).

72273424 is a wasteful number, since it uses less digits than its factorization.

72273424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4517097 (or 4517091 counting only the distinct ones).

The product of its digits is 18816, while the sum is 31.

The square root of 72273424 is about 8501.3777706911. The cubic root of 72273424 is about 416.5427149878.

The spelling of 72273424 in words is "seventy-two million, two hundred seventy-three thousand, four hundred twenty-four".