1243875648 has 28 divisors (see below), whose sum is σ = 3291088160. Its totient is φ = 414625152.

The previous prime is 1243875643. The next prime is 1243875649. The reversal of 1243875648 is 8465783421.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 1243875597 and 1243875606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243875643) 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, 3239068 + ... + 3239451.

Almost surely, 2^1243875648 is an apocalyptic number.

It is an amenable number.

1243875648 is an abundant number, since it is smaller than the sum of its proper divisors (2047212512).

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

1243875648 is an equidigital number, since it uses as much as digits as its factorization.

1243875648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6478534 (or 6478524 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 48.

The square root of 1243875648 is about 35268.6212942893. The cubic root of 1243875648 is about 1075.4551951476.

The spelling of 1243875648 in words is "one billion, two hundred forty-three million, eight hundred seventy-five thousand, six hundred forty-eight".