538720 has 96 divisors (see below), whose sum is σ = 1608768. Its totient is φ = 165888.

The previous prime is 538711. The next prime is 538721. The reversal of 538720 is 27835.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538721) by changing a digit.

538720 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14542 + ... + 14578.

It is an arithmetic number, because the mean of its divisors is an integer number (16758).

2⁵³⁸⁷²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 538720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (804384).

538720 is an abundant number, since it is smaller than the sum of its proper divisors (1070048).

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

538720 is a wasteful number, since it uses less digits than its factorization.

538720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 538720 is about 733.9754764296. The cubic root of 538720 is about 81.3681358420.

It can be divided in two parts, 5 and 38720, that multiplied together give a square (193600 = 440²).

The spelling of 538720 in words is "five hundred thirty-eight thousand, seven hundred twenty".