1243552240 has 80 divisors (see below), whose sum is σ = 3393657792. Its totient is φ = 414830592.

The previous prime is 1243552229. The next prime is 1243552253. The reversal of 1243552240 is 422553421.

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

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 1243552199 and 1243552208.

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, 9289 + ... + 50728.

Almost surely, 2^1243552240 is an apocalyptic number.

1243552240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1243552240 is an abundant number, since it is smaller than the sum of its proper divisors (2150105552).

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

1243552240 is a wasteful number, since it uses less digits than its factorization.

1243552240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60074 (or 60068 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 1243552240 is about 35264.0360707620. The cubic root of 1243552240 is about 1075.3619808561.

The spelling of 1243552240 in words is "one billion, two hundred forty-three million, five hundred fifty-two thousand, two hundred forty".