72342520 has 32 divisors (see below), whose sum is σ = 163120320. Its totient is φ = 28874880.

The previous prime is 72342451. The next prime is 72342553. The reversal of 72342520 is 2524327.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19969 + ... + 23311.

It is an arithmetic number, because the mean of its divisors is an integer number (5097510).

Almost surely, 2^72342520 is an apocalyptic number.

It is an amenable number.

72342520 is an abundant number, since it is smaller than the sum of its proper divisors (90777800).

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

72342520 is a wasteful number, since it uses less digits than its factorization.

72342520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3895 (or 3891 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 72342520 is about 8505.4406117496. The cubic root of 72342520 is about 416.6754159941.

Adding to 72342520 its reverse (2524327), we get a palindrome (74866847).

The spelling of 72342520 in words is "seventy-two million, three hundred forty-two thousand, five hundred twenty".