784138232020 has 192 divisors, whose sum is σ = 2004450416640. Its totient is φ = 253728921600.

The previous prime is 784138231969. The next prime is 784138232027. The reversal of 784138232020 is 20232831487.

It is a super-2 number, since 2×784138232020² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (784138232027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 54816189 + ... + 54830491.

It is an arithmetic number, because the mean of its divisors is an integer number (10439845920).

Almost surely, 2^784138232020 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 784138232020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1002225208320).

784138232020 is an abundant number, since it is smaller than the sum of its proper divisors (1220312184620).

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

784138232020 is a wasteful number, since it uses less digits than its factorization.

784138232020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15026 (or 15024 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 40.

The spelling of 784138232020 in words is "seven hundred eighty-four billion, one hundred thirty-eight million, two hundred thirty-two thousand, twenty".