1535040440 has 32 divisors (see below), whose sum is σ = 3467303280. Its totient is φ = 611622912.

The previous prime is 1535040413. The next prime is 1535040443. The reversal of 1535040440 is 440405351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1535040443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64382 + ... + 84941.

Almost surely, 2^1535040440 is an apocalyptic number.

1535040440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1535040440 is an abundant number, since it is smaller than the sum of its proper divisors (1932262840).

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

1535040440 is a wasteful number, since it uses less digits than its factorization.

1535040440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149591 (or 149587 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 1535040440 is about 39179.5921367234. The cubic root of 1535040440 is about 1153.5593414398.

Adding to 1535040440 its reverse (440405351), we get a palindrome (1975445791).

The spelling of 1535040440 in words is "one billion, five hundred thirty-five million, forty thousand, four hundred forty".