1381887742 has 8 divisors (see below), whose sum is σ = 2076007896. Its totient is φ = 689885112.

The previous prime is 1381887719. The next prime is 1381887751. The reversal of 1381887742 is 2477881831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1381887742² = 3819227462979717128, which contains 22 as substring.

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, 527748 + ... + 530359.

It is an arithmetic number, because the mean of its divisors is an integer number (259500987).

Almost surely, 2^1381887742 is an apocalyptic number.

1381887742 is a deficient number, since it is larger than the sum of its proper divisors (694120154).

1381887742 is a wasteful number, since it uses less digits than its factorization.

1381887742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058762.

The product of its digits is 602112, while the sum is 49.

The square root of 1381887742 is about 37173.7507120280. The cubic root of 1381887742 is about 1113.8437052081.

The spelling of 1381887742 in words is "one billion, three hundred eighty-one million, eight hundred eighty-seven thousand, seven hundred forty-two".