1540440352 has 72 divisors (see below), whose sum is σ = 3509125200. Its totient is φ = 663315840.

The previous prime is 1540440337. The next prime is 1540440383. The reversal of 1540440352 is 2530440451.

It is a self number, because there is not a number n which added to its sum of digits gives 1540440352.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63099 + ... + 84037.

It is an arithmetic number, because the mean of its divisors is an integer number (48737850).

Almost surely, 2^1540440352 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1540440352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1754562600).

1540440352 is an abundant number, since it is smaller than the sum of its proper divisors (1968684848).

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

1540440352 is a wasteful number, since it uses less digits than its factorization.

1540440352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20990 (or 20971 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 1540440352 is about 39248.4439436776. The cubic root of 1540440352 is about 1154.9104087726.

Subtracting 1540440352 from its reverse (2530440451), we obtain a palindrome (990000099).

The spelling of 1540440352 in words is "one billion, five hundred forty million, four hundred forty thousand, three hundred fifty-two".