1539052440 has 128 divisors (see below), whose sum is σ = 4910976000. Its totient is φ = 384749568.

The previous prime is 1539052399. The next prime is 1539052447. The reversal of 1539052440 is 442509351.

1539052440 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1539052447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 217681 + ... + 224639.

It is an arithmetic number, because the mean of its divisors is an integer number (38367000).

Almost surely, 2^1539052440 is an apocalyptic number.

1539052440 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 1539052440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2455488000).

1539052440 is an abundant number, since it is smaller than the sum of its proper divisors (3371923560).

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

1539052440 is a wasteful number, since it uses less digits than its factorization.

1539052440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7089 (or 7085 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 1539052440 is about 39230.7588506774. The cubic root of 1539052440 is about 1154.5634526454.

The spelling of 1539052440 in words is "one billion, five hundred thirty-nine million, fifty-two thousand, four hundred forty".