1383889581 has 12 divisors (see below), whose sum is σ = 2008999200. Its totient is φ = 917955720.

The previous prime is 1383889571. The next prime is 1383889583. The reversal of 1383889581 is 1859883831.

It is not a de Polignac number, because 1383889581 - 2⁶ = 1383889517 is a prime.

It is a super-2 number, since 2×1383889581² = 3830300744800711122, which contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1383889583) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 384555 + ... + 388136.

It is an arithmetic number, because the mean of its divisors is an integer number (167416600).

Almost surely, 2^1383889581 is an apocalyptic number.

It is an amenable number.

1383889581 is a deficient number, since it is larger than the sum of its proper divisors (625109619).

1383889581 is a wasteful number, since it uses less digits than its factorization.

1383889581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772896 (or 772893 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 54.

The square root of 1383889581 is about 37200.6664053213. Note that the first 3 decimals coincide. The cubic root of 1383889581 is about 1114.3812934849.

The spelling of 1383889581 in words is "one billion, three hundred eighty-three million, eight hundred eighty-nine thousand, five hundred eighty-one".