1381888 has 20 divisors (see below), whose sum is σ = 2762100. Its totient is φ = 690688.

The previous prime is 1381883. The next prime is 1381901. The reversal of 1381888 is 8881831.

It is a super-2 number, since 2×1381888² = 3819228889088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 838 + ... + 1861.

It is an arithmetic number, because the mean of its divisors is an integer number (138105).

2^1381888 is an apocalyptic number.

It is an amenable number.

1381888 is a deficient number, since it is larger than the sum of its proper divisors (1380212).

1381888 is an frugal number, since it uses more digits than its factorization.

1381888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2717 (or 2701 counting only the distinct ones).

The product of its digits is 12288, while the sum is 37.

The square root of 1381888 is about 1175.5373239502. The cubic root of 1381888 is about 111.3843774527.

The spelling of 1381888 in words is "one million, three hundred eighty-one thousand, eight hundred eighty-eight".