538705920 has 152 divisors (see below), whose sum is σ = 1736438544. Its totient is φ = 142606336.

The previous prime is 538705901. The next prime is 538705949. The reversal of 538705920 is 29507835.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3932092 + ... + 3932228.

Almost surely, 2^538705920 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 538705920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (868219272).

538705920 is an abundant number, since it is smaller than the sum of its proper divisors (1197732624).

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

538705920 is an frugal number, since it uses more digits than its factorization.

538705920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 538705920 is about 23210.0392072051. The cubic root of 538705920 is about 813.6742695587.

The spelling of 538705920 in words is "five hundred thirty-eight million, seven hundred five thousand, nine hundred twenty".