1328743238 has 4 divisors (see below), whose sum is σ = 1993114860. Its totient is φ = 664371618.

The previous prime is 1328743219. The next prime is 1328743243. The reversal of 1328743238 is 8323478231.

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 = 1328743195 and 1328743204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332185808 + ... + 332185811.

It is an arithmetic number, because the mean of its divisors is an integer number (498278715).

Almost surely, 2^1328743238 is an apocalyptic number.

1328743238 is a deficient number, since it is larger than the sum of its proper divisors (664371622).

1328743238 is an equidigital number, since it uses as much as digits as its factorization.

1328743238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664371621.

The product of its digits is 193536, while the sum is 41.

The square root of 1328743238 is about 36451.9305112912. The cubic root of 1328743238 is about 1099.3779507773.

The spelling of 1328743238 in words is "one billion, three hundred twenty-eight million, seven hundred forty-three thousand, two hundred thirty-eight".