538457820 has 96 divisors (see below), whose sum is σ = 1532139840. Its totient is φ = 141281280.

The previous prime is 538457809. The next prime is 538457827. The reversal of 538457820 is 28754835.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538457827) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1837594 + ... + 1837886.

It is an arithmetic number, because the mean of its divisors is an integer number (15959790).

Almost surely, 2^538457820 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 538457820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (766069920).

538457820 is an abundant number, since it is smaller than the sum of its proper divisors (993682020).

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

538457820 is a wasteful number, since it uses less digits than its factorization.

538457820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695 (or 693 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 42.

The square root of 538457820 is about 23204.6939217047. The cubic root of 538457820 is about 813.5493383254.

The spelling of 538457820 in words is "five hundred thirty-eight million, four hundred fifty-seven thousand, eight hundred twenty".