1540533520 has 40 divisors (see below), whose sum is σ = 3613458456. Its totient is φ = 610756608.

The previous prime is 1540533503. The next prime is 1540533541. The reversal of 1540533520 is 253350451.

It can be written as a sum of positive squares in 4 ways, for example, as 75481344 + 1465052176 = 8688^2 + 38276^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76167 + ... + 94246.

Almost surely, 2^1540533520 is an apocalyptic number.

1540533520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1540533520 is an abundant number, since it is smaller than the sum of its proper divisors (2072924936).

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

1540533520 is a wasteful number, since it uses less digits than its factorization.

1540533520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170539 (or 170533 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 1540533520 is about 39249.6308262893. The cubic root of 1540533520 is about 1154.9336918387.

Adding to 1540533520 its reverse (253350451), we get a palindrome (1793883971).

The spelling of 1540533520 in words is "one billion, five hundred forty million, five hundred thirty-three thousand, five hundred twenty".