1243356480 has 140 divisors (see below), whose sum is σ = 4422929940. Its totient is φ = 331554816.

The previous prime is 1243356461. The next prime is 1243356487. The reversal of 1243356480 is 846533421.

1243356480 is a `hidden beast` number, since 1 + 2 + 4 + 3 + 3 + 5 + 648 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 705858624 + 537497856 = 26568^2 + 23184^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243356487) 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 19 ways as a sum of consecutive naturals, for example, 1936 + ... + 49904.

Almost surely, 2^1243356480 is an apocalyptic number.

1243356480 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 1243356480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2211464970).

1243356480 is an abundant number, since it is smaller than the sum of its proper divisors (3179573460).

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

1243356480 is an equidigital number, since it uses as much as digits as its factorization.

1243356480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47998 (or 47979 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 1243356480 is about 35261.2603291488. The cubic root of 1243356480 is about 1075.3055500653.

The spelling of 1243356480 in words is "one billion, two hundred forty-three million, three hundred fifty-six thousand, four hundred eighty".