1243946880 has 384 divisors, whose sum is σ = 4854751200. Its totient is φ = 290734080.

The previous prime is 1243946863. The next prime is 1243946887. The reversal of 1243946880 is 886493421.

It is a happy number.

1243946880 is a `hidden beast` number, since 124 + 394 + 68 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243946887) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1837102 + ... + 1837778.

Almost surely, 2^1243946880 is an apocalyptic number.

1243946880 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 1243946880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2427375600).

1243946880 is an abundant number, since it is smaller than the sum of its proper divisors (3610804320).

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

1243946880 is a wasteful number, since it uses less digits than its factorization.

1243946880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742 (or 727 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 1243946880 is about 35269.6311293441. The cubic root of 1243946880 is about 1075.4757238240.

It can be divided in two parts, 12439 and 46880, that added together give a cube (59319 = 39³).

The spelling of 1243946880 in words is "one billion, two hundred forty-three million, nine hundred forty-six thousand, eight hundred eighty".