1381908056 has 16 divisors (see below), whose sum is σ = 2591587440. Its totient is φ = 690818080.

The previous prime is 1381908043. The next prime is 1381908083. The reversal of 1381908056 is 6508091831.

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, 35885 + ... + 63651.

It is an arithmetic number, because the mean of its divisors is an integer number (161974215).

Almost surely, 2^1381908056 is an apocalyptic number.

It is an amenable number.

1381908056 is a deficient number, since it is larger than the sum of its proper divisors (1209679384).

1381908056 is a wasteful number, since it uses less digits than its factorization.

1381908056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33994 (or 33990 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 1381908056 is about 37174.0239414568. The cubic root of 1381908056 is about 1113.8491630827.

Adding to 1381908056 its reverse (6508091831), we get a palindrome (7889999887).

The spelling of 1381908056 in words is "one billion, three hundred eighty-one million, nine hundred eight thousand, fifty-six".