1230445240 has 32 divisors (see below), whose sum is σ = 2783813760. Its totient is φ = 489456000.

The previous prime is 1230445231. The next prime is 1230445241. The reversal of 1230445240 is 425440321.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230445241) 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, 77736 + ... + 92215.

It is an arithmetic number, because the mean of its divisors is an integer number (86994180).

Almost surely, 2^1230445240 is an apocalyptic number.

1230445240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1230445240 is an abundant number, since it is smaller than the sum of its proper divisors (1553368520).

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

1230445240 is a wasteful number, since it uses less digits than its factorization.

1230445240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170143 (or 170139 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 1230445240 is about 35077.7028894425. The cubic root of 1230445240 is about 1071.5705355339.

Adding to 1230445240 its reverse (425440321), we get a palindrome (1655885561).

The spelling of 1230445240 in words is "one billion, two hundred thirty million, four hundred forty-five thousand, two hundred forty".