7243647840 has 576 divisors, whose sum is σ = 30066603840. Its totient is φ = 1563770880.

The previous prime is 7243647833. The next prime is 7243647841. The reversal of 7243647840 is 487463427.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

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 (7243647841) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5971074 + ... + 5972286.

It is an arithmetic number, because the mean of its divisors is an integer number (52198965).

Almost surely, 2^7243647840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7243647840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15033301920).

7243647840 is an abundant number, since it is smaller than the sum of its proper divisors (22822956000).

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

7243647840 is a wasteful number, since it uses less digits than its factorization.

7243647840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287 (or 1276 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 45.

The square root of 7243647840 is about 85109.6224877070. The cubic root of 7243647840 is about 1934.8729039371.

The spelling of 7243647840 in words is "seven billion, two hundred forty-three million, six hundred forty-seven thousand, eight hundred forty".