1138803840 has 256 divisors, whose sum is σ = 4105296000. Its totient is φ = 298266624.

The previous prime is 1138803821. The next prime is 1138803851. The reversal of 1138803840 is 483088311.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1138803795 and 1138803804.

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, 1018962 + ... + 1020078.

Almost surely, 2^1138803840 is an apocalyptic number.

1138803840 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 1138803840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2052648000).

1138803840 is an abundant number, since it is smaller than the sum of its proper divisors (2966492160).

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

1138803840 is a wasteful number, since it uses less digits than its factorization.

1138803840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1204 (or 1186 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 1138803840 is about 33746.1677824312. The cubic root of 1138803840 is about 1044.2784301633.

The spelling of 1138803840 in words is "one billion, one hundred thirty-eight million, eight hundred three thousand, eight hundred forty".