1381268856 has 32 divisors (see below), whose sum is σ = 3767097600. Its totient is φ = 418566240.

The previous prime is 1381268839. The next prime is 1381268909. The reversal of 1381268856 is 6588621831.

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, 2615776 + ... + 2616303.

It is an arithmetic number, because the mean of its divisors is an integer number (117721800).

Almost surely, 2^1381268856 is an apocalyptic number.

It is an amenable number.

1381268856 is an abundant number, since it is smaller than the sum of its proper divisors (2385828744).

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

1381268856 is a wasteful number, since it uses less digits than its factorization.

1381268856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5232099 (or 5232095 counting only the distinct ones).

The product of its digits is 552960, while the sum is 48.

The square root of 1381268856 is about 37165.4255457946. The cubic root of 1381268856 is about 1113.6774000424.

The spelling of 1381268856 in words is "one billion, three hundred eighty-one million, two hundred sixty-eight thousand, eight hundred fifty-six".