1243193880 has 32 divisors (see below), whose sum is σ = 3729582000. Its totient is φ = 331518336.

The previous prime is 1243193879. The next prime is 1243193881. The reversal of 1243193880 is 883913421.

It is an interprime number because it is at equal distance from previous prime (1243193879) and next prime (1243193881).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243193881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5179855 + ... + 5180094.

Almost surely, 2^1243193880 is an apocalyptic number.

1243193880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1243193880 is an abundant number, since it is smaller than the sum of its proper divisors (2486388120).

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

1243193880 is a wasteful number, since it uses less digits than its factorization.

1243193880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10359963 (or 10359959 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 1243193880 is about 35258.9546073051. The cubic root of 1243193880 is about 1075.2586736445.

The spelling of 1243193880 in words is "one billion, two hundred forty-three million, one hundred ninety-three thousand, eight hundred eighty".