538840020 has 24 divisors (see below), whose sum is σ = 1508752224. Its totient is φ = 143690656.

The previous prime is 538839989. The next prime is 538840037. The reversal of 538840020 is 20048835.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a self number, because there is not a number n which added to its sum of digits gives 538840020.

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, 4490274 + ... + 4490393.

It is an arithmetic number, because the mean of its divisors is an integer number (62864676).

Almost surely, 2^538840020 is an apocalyptic number.

It is an amenable number.

538840020 is an abundant number, since it is smaller than the sum of its proper divisors (969912204).

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

538840020 is a wasteful number, since it uses less digits than its factorization.

538840020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8980679 (or 8980677 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 538840020 is about 23212.9278635850. The cubic root of 538840020 is about 813.7417799033.

Adding to 538840020 its reverse (20048835), we get a palindrome (558888855).

The spelling of 538840020 in words is "five hundred thirty-eight million, eight hundred forty thousand, twenty".