1383559440 has 160 divisors (see below), whose sum is σ = 4392576000. Its totient is φ = 360138240.

The previous prime is 1383559427. The next prime is 1383559523. The reversal of 1383559440 is 449553831.

It is a super-2 number, since 2×1383559440² = 3828473448026227200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1383559392 and 1383559401.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2817595 + ... + 2818085.

It is an arithmetic number, because the mean of its divisors is an integer number (27453600).

Almost surely, 2^1383559440 is an apocalyptic number.

1383559440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1383559440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2196288000).

1383559440 is an abundant number, since it is smaller than the sum of its proper divisors (3009016560).

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

1383559440 is a wasteful number, since it uses less digits than its factorization.

1383559440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765 (or 759 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The square root of 1383559440 is about 37196.2288411070. The cubic root of 1383559440 is about 1114.2926707559.

The spelling of 1383559440 in words is "one billion, three hundred eighty-three million, five hundred fifty-nine thousand, four hundred forty".