1238328420 has 192 divisors, whose sum is σ = 4315852800. Its totient is φ = 258854400.

The previous prime is 1238328379. The next prime is 1238328437. The reversal of 1238328420 is 248238321.

1238328420 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 228745 + ... + 234095.

It is an arithmetic number, because the mean of its divisors is an integer number (22478400).

Almost surely, 2^1238328420 is an apocalyptic number.

1238328420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1238328420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2157926400).

1238328420 is an abundant number, since it is smaller than the sum of its proper divisors (3077524380).

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

1238328420 is a wasteful number, since it uses less digits than its factorization.

1238328420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5418 (or 5416 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 1238328420 is about 35189.8908779212. The cubic root of 1238328420 is about 1073.8541011164.

Subtracting from 1238328420 its reverse (248238321), we obtain a palindrome (990090099).

The spelling of 1238328420 in words is "one billion, two hundred thirty-eight million, three hundred twenty-eight thousand, four hundred twenty".