53720730 has 96 divisors (see below), whose sum is σ = 162010368. Its totient is φ = 12096000.

The previous prime is 53720677. The next prime is 53720743. The reversal of 53720730 is 3702735.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 53720694 and 53720703.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44130 + ... + 45330.

It is an arithmetic number, because the mean of its divisors is an integer number (1687608).

Almost surely, 2^53720730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53720730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81005184).

53720730 is an abundant number, since it is smaller than the sum of its proper divisors (108289638).

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

53720730 is a wasteful number, since it uses less digits than its factorization.

53720730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1292 (or 1289 counting only the distinct ones).

The product of its (nonzero) digits is 4410, while the sum is 27.

The square root of 53720730 is about 7329.4426800405. The cubic root of 53720730 is about 377.3235992930.

The spelling of 53720730 in words is "fifty-three million, seven hundred twenty thousand, seven hundred thirty".