383743220728420 has 36 divisors (see below), whose sum is σ = 937429867781820. Its totient is φ = 131569104249408.

The previous prime is 383743220728409. The next prime is 383743220728421. The reversal of 383743220728420 is 24827022347383.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 111684653065216 + 272058567663204 = 10568096^2 + 16494198^2 .

It is not an unprimeable number, because it can be changed into a prime (383743220728421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 195787356535 + ... + 195787358494.

It is an arithmetic number, because the mean of its divisors is an integer number (26039718549495).

Almost surely, 2^{383743220728420} is an apocalyptic number.

It is an amenable number.

383743220728420 is an abundant number, since it is smaller than the sum of its proper divisors (553686647053400).

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

383743220728420 is a wasteful number, since it uses less digits than its factorization.

383743220728420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391574715052 (or 391574715043 counting only the distinct ones).

The product of its (nonzero) digits is 21676032, while the sum is 55.

The spelling of 383743220728420 in words is "three hundred eighty-three trillion, seven hundred forty-three billion, two hundred twenty million, seven hundred twenty-eight thousand, four hundred twenty".