1243914240 has 224 divisors, whose sum is σ = 4076614656. Its totient is φ = 323747840.

The previous prime is 1243914227. The next prime is 1243914251. The reversal of 1243914240 is 424193421.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1243914198 and 1243914207.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6512545 + ... + 6512735.

Almost surely, 2^1243914240 is an apocalyptic number.

1243914240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1243914240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2038307328).

1243914240 is an abundant number, since it is smaller than the sum of its proper divisors (2832700416).

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

1243914240 is an equidigital number, since it uses as much as digits as its factorization.

1243914240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278 (or 254 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 1243914240 is about 35269.1684052800. The cubic root of 1243914240 is about 1075.4663172502.

The spelling of 1243914240 in words is "one billion, two hundred forty-three million, nine hundred fourteen thousand, two hundred forty".