1331528040 has 96 divisors (see below), whose sum is σ = 4476724200. Its totient is φ = 342827520.

The previous prime is 1331528039. The next prime is 1331528047. The reversal of 1331528040 is 408251331.

It is a happy number.

1331528040 is a `hidden beast` number, since 133 + 1 + 528 + 0 + 4 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1244255076 + 87272964 = 35274^2 + 9342^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1331527995 and 1331528013.

It is not an unprimeable number, because it can be changed into a prime (1331528047) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53331 + ... + 74210.

Almost surely, 2^1331528040 is an apocalyptic number.

1331528040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331528040 is an abundant number, since it is smaller than the sum of its proper divisors (3145196160).

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

1331528040 is a wasteful number, since it uses less digits than its factorization.

1331528040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127587 (or 127580 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1331528040 is about 36490.1087967685. The cubic root of 1331528040 is about 1100.1454463324.

Adding to 1331528040 its reverse (408251331), we get a palindrome (1739779371).

The spelling of 1331528040 in words is "one billion, three hundred thirty-one million, five hundred twenty-eight thousand, forty".