1139530240 has 160 divisors (see below), whose sum is σ = 2870816256. Its totient is φ = 433274880.

The previous prime is 1139530237. The next prime is 1139530241. The reversal of 1139530240 is 420359311.

It is a tau number, because it is divible by the number of its divisors (160).

It is a junction number, because it is equal to n+sod(n) for n = 1139530199 and 1139530208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1139530241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6586794 + ... + 6586966.

Almost surely, 2^1139530240 is an apocalyptic number.

1139530240 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 1139530240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1435408128).

1139530240 is an abundant number, since it is smaller than the sum of its proper divisors (1731286016).

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

1139530240 is an equidigital number, since it uses as much as digits as its factorization.

1139530240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310 (or 294 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 1139530240 is about 33756.9287702540. The cubic root of 1139530240 is about 1044.5004182399.

Adding to 1139530240 its reverse (420359311), we get a palindrome (1559889551).

The spelling of 1139530240 in words is "one billion, one hundred thirty-nine million, five hundred thirty thousand, two hundred forty".