1648318838 has 4 divisors (see below), whose sum is σ = 2472478260. Its totient is φ = 824159418.

The previous prime is 1648318831. The next prime is 1648318873. The reversal of 1648318838 is 8388138461.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1648318831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412079708 + ... + 412079711.

It is an arithmetic number, because the mean of its divisors is an integer number (618119565).

Almost surely, 2^1648318838 is an apocalyptic number.

1648318838 is a deficient number, since it is larger than the sum of its proper divisors (824159422).

1648318838 is an equidigital number, since it uses as much as digits as its factorization.

1648318838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824159421.

The product of its digits is 884736, while the sum is 50.

The square root of 1648318838 is about 40599.4930756531. The cubic root of 1648318838 is about 1181.2642865008.

The spelling of 1648318838 in words is "one billion, six hundred forty-eight million, three hundred eighteen thousand, eight hundred thirty-eight".