1338917856 has 24 divisors (see below), whose sum is σ = 3514659624. Its totient is φ = 446305920.

The previous prime is 1338917819. The next prime is 1338917861. The reversal of 1338917856 is 6587198331.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 1338917799 and 1338917808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6973435 + ... + 6973626.

It is an arithmetic number, because the mean of its divisors is an integer number (146444151).

Almost surely, 2^1338917856 is an apocalyptic number.

1338917856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1338917856 is an abundant number, since it is smaller than the sum of its proper divisors (2175741768).

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

1338917856 is a wasteful number, since it uses less digits than its factorization.

1338917856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13947074 (or 13947066 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 51.

The square root of 1338917856 is about 36591.2264894196. The cubic root of 1338917856 is about 1102.1769165556.

The spelling of 1338917856 in words is "one billion, three hundred thirty-eight million, nine hundred seventeen thousand, eight hundred fifty-six".