72343720 has 32 divisors (see below), whose sum is σ = 163036800. Its totient is φ = 28890688.

The previous prime is 72343703. The next prime is 72343729. The reversal of 72343720 is 2734327.

It is a super-2 number, since 2×72343720² = 10467227646876800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72343729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34461 + ... + 36499.

It is an arithmetic number, because the mean of its divisors is an integer number (5094900).

Almost surely, 2^72343720 is an apocalyptic number.

It is an amenable number.

72343720 is an abundant number, since it is smaller than the sum of its proper divisors (90693080).

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

72343720 is a wasteful number, since it uses less digits than its factorization.

72343720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2937 (or 2933 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 28.

The square root of 72343720 is about 8505.5111545397. The cubic root of 72343720 is about 416.6777198846.

The spelling of 72343720 in words is "seventy-two million, three hundred forty-three thousand, seven hundred twenty".