1228380408238 has 4 divisors (see below), whose sum is σ = 1842570612360. Its totient is φ = 614190204118.

The previous prime is 1228380408223. The next prime is 1228380408239. The reversal of 1228380408238 is 8328040838221.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 1228380408191 and 1228380408200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228380408239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307095102058 + ... + 307095102061.

It is an arithmetic number, because the mean of its divisors is an integer number (460642653090).

Almost surely, 2^{1228380408238} is an apocalyptic number.

1228380408238 is a deficient number, since it is larger than the sum of its proper divisors (614190204122).

1228380408238 is an equidigital number, since it uses as much as digits as its factorization.

1228380408238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614190204121.

The product of its (nonzero) digits is 1179648, while the sum is 49.

The spelling of 1228380408238 in words is "one trillion, two hundred twenty-eight billion, three hundred eighty million, four hundred eight thousand, two hundred thirty-eight".