1313820838 has 16 divisors (see below), whose sum is σ = 2154548736. Its totient is φ = 595896840.

The previous prime is 1313820817. The next prime is 1313820841. The reversal of 1313820838 is 8380283131.

It is a super-2 number, since 2×1313820838² = 3452250388726044488, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1313820797 and 1313820806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54306 + ... + 74677.

It is an arithmetic number, because the mean of its divisors is an integer number (134659296).

Almost surely, 2^1313820838 is an apocalyptic number.

1313820838 is a deficient number, since it is larger than the sum of its proper divisors (840727898).

1313820838 is a wasteful number, since it uses less digits than its factorization.

1313820838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129459.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 1313820838 is about 36246.6665777696. Note that the first 3 decimals coincide. The cubic root of 1313820838 is about 1095.2469402688.

The spelling of 1313820838 in words is "one billion, three hundred thirteen million, eight hundred twenty thousand, eight hundred thirty-eight".