72320740 has 24 divisors (see below), whose sum is σ = 158477760. Its totient is φ = 27670368.

The previous prime is 72320723. The next prime is 72320753. The reversal of 72320740 is 4702327.

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 7 ways as a sum of consecutive naturals, for example, 78150 + ... + 79069.

It is an arithmetic number, because the mean of its divisors is an integer number (6603240).

Almost surely, 2^72320740 is an apocalyptic number.

It is an amenable number.

72320740 is an abundant number, since it is smaller than the sum of its proper divisors (86157020).

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

72320740 is a wasteful number, since it uses less digits than its factorization.

72320740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157251 (or 157249 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 25.

The square root of 72320740 is about 8504.1601584166. The cubic root of 72320740 is about 416.6335959530.

The spelling of 72320740 in words is "seventy-two million, three hundred twenty thousand, seven hundred forty".