1338678956 has 6 divisors (see below), whose sum is σ = 2342688180. Its totient is φ = 669339476.

The previous prime is 1338678941. The next prime is 1338678989. The reversal of 1338678956 is 6598768331.

It is a super-2 number, since 2×1338678956² = 3584122694474499872, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167334866 + ... + 167334873.

It is an arithmetic number, because the mean of its divisors is an integer number (390448030).

Almost surely, 2^1338678956 is an apocalyptic number.

It is an amenable number.

1338678956 is a deficient number, since it is larger than the sum of its proper divisors (1004009224).

1338678956 is a wasteful number, since it uses less digits than its factorization.

1338678956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334669743 (or 334669741 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 56.

The square root of 1338678956 is about 36587.9619000567. The cubic root of 1338678956 is about 1102.1113597015. Note that the first 3 decimals are identical.

The spelling of 1338678956 in words is "one billion, three hundred thirty-eight million, six hundred seventy-eight thousand, nine hundred fifty-six".