1243584240 has 80 divisors (see below), whose sum is σ = 4022742528. Its totient is φ = 317202688.

The previous prime is 1243584197. The next prime is 1243584259. The reversal of 1243584240 is 424853421.

1243584240 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107124 + ... + 118163.

Almost surely, 2^1243584240 is an apocalyptic number.

1243584240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1243584240 is an abundant number, since it is smaller than the sum of its proper divisors (2779158288).

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

1243584240 is a wasteful number, since it uses less digits than its factorization.

1243584240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225326 (or 225320 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 33.

The square root of 1243584240 is about 35264.4897878872. The cubic root of 1243584240 is about 1075.3712047785.

The spelling of 1243584240 in words is "one billion, two hundred forty-three million, five hundred eighty-four thousand, two hundred forty".