1230445140 has 24 divisors (see below), whose sum is σ = 3445246560. Its totient is φ = 328118688.

The previous prime is 1230445133. The next prime is 1230445171. The reversal of 1230445140 is 415440321.

It is a self number, because there is not a number n which added to its sum of digits gives 1230445140.

It is a congruent number.

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, 10253650 + ... + 10253769.

It is an arithmetic number, because the mean of its divisors is an integer number (143551940).

Almost surely, 2^1230445140 is an apocalyptic number.

1230445140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1230445140 is an abundant number, since it is smaller than the sum of its proper divisors (2214801420).

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

1230445140 is a wasteful number, since it uses less digits than its factorization.

1230445140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20507431 (or 20507429 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 1230445140 is about 35077.7014640355. The cubic root of 1230445140 is about 1071.5705065046.

Adding to 1230445140 its reverse (415440321), we get a palindrome (1645885461).

The spelling of 1230445140 in words is "one billion, two hundred thirty million, four hundred forty-five thousand, one hundred forty".