1381887748 has 24 divisors (see below), whose sum is σ = 2525987520. Its totient is φ = 660237600.

The previous prime is 1381887719. The next prime is 1381887751. The reversal of 1381887748 is 8477881831.

It is a super-2 number, since 2×1381887748² = 3819227496145023008, which contains 22 as substring.

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, 91323 + ... + 105373.

It is an arithmetic number, because the mean of its divisors is an integer number (105249480).

Almost surely, 2^1381887748 is an apocalyptic number.

It is an amenable number.

1381887748 is a deficient number, since it is larger than the sum of its proper divisors (1144099772).

1381887748 is a wasteful number, since it uses less digits than its factorization.

1381887748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15147 (or 15145 counting only the distinct ones).

The product of its digits is 2408448, while the sum is 55.

The square root of 1381887748 is about 37173.7507927301. The cubic root of 1381887748 is about 1113.8437068201.

The spelling of 1381887748 in words is "one billion, three hundred eighty-one million, eight hundred eighty-seven thousand, seven hundred forty-eight".