1230520040 has 16 divisors (see below), whose sum is σ = 2768670180. Its totient is φ = 492208000.

The previous prime is 1230520013. The next prime is 1230520043. The reversal of 1230520040 is 400250321.

It can be written as a sum of positive squares in 2 ways, for example, as 1228782916 + 1737124 = 35054^2 + 1318^2 .

It is not an unprimeable number, because it can be changed into a prime (1230520043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15381461 + ... + 15381540.

Almost surely, 2^1230520040 is an apocalyptic number.

1230520040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1230520040 is an abundant number, since it is smaller than the sum of its proper divisors (1538150140).

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

1230520040 is a wasteful number, since it uses less digits than its factorization.

1230520040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30763012 (or 30763008 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 1230520040 is about 35078.7690776059. The cubic root of 1230520040 is about 1071.5922490431.

Adding to 1230520040 its reverse (400250321), we get a palindrome (1630770361).

The spelling of 1230520040 in words is "one billion, two hundred thirty million, five hundred twenty thousand, forty".