1230040040 has 16 divisors (see below), whose sum is σ = 2767590180. Its totient is φ = 492016000.

The previous prime is 1230039991. The next prime is 1230040043. The reversal of 1230040040 is 400400321.

It can be written as a sum of positive squares in 2 ways, for example, as 1183772836 + 46267204 = 34406^2 + 6802^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1230039997 and 1230040024.

It is not an unprimeable number, because it can be changed into a prime (1230040043) 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, 15375461 + ... + 15375540.

Almost surely, 2^1230040040 is an apocalyptic number.

1230040040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1230040040 is an abundant number, since it is smaller than the sum of its proper divisors (1537550140).

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

1230040040 is a wasteful number, since it uses less digits than its factorization.

1230040040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30751012 (or 30751008 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 1230040040 is about 35071.9266650693. The cubic root of 1230040040 is about 1071.4528957187.

Adding to 1230040040 its reverse (400400321), we get a palindrome (1630440361).

The spelling of 1230040040 in words is "one billion, two hundred thirty million, forty thousand, forty".