538309122840 has 384 divisors, whose sum is σ = 1949736821760. Its totient is φ = 133085804544.

The previous prime is 538309122809. The next prime is 538309122887. The reversal of 538309122840 is 48221903835.

538309122840 is a `hidden beast` number, since 5 + 383 + 0 + 9 + 1 + 228 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 11046769 + ... + 11095391.

It is an arithmetic number, because the mean of its divisors is an integer number (5077439640).

Almost surely, 2^538309122840 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 538309122840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (974868410880).

538309122840 is an abundant number, since it is smaller than the sum of its proper divisors (1411427698920).

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

538309122840 is a wasteful number, since it uses less digits than its factorization.

538309122840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48733 (or 48717 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 538309122840 in words is "five hundred thirty-eight billion, three hundred nine million, one hundred twenty-two thousand, eight hundred forty".