7643843420 has 24 divisors (see below), whose sum is σ = 16054038000. Its totient is φ = 3057162752.

The previous prime is 7643843419. The next prime is 7643843429. The reversal of 7643843420 is 243483467.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7643843429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192431 + ... + 228729.

It is an arithmetic number, because the mean of its divisors is an integer number (668918250).

Almost surely, 2^7643843420 is an apocalyptic number.

It is an amenable number.

7643843420 is an abundant number, since it is smaller than the sum of its proper divisors (8410194580).

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

7643843420 is a wasteful number, since it uses less digits than its factorization.

7643843420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46837 (or 46835 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 41.

The square root of 7643843420 is about 87429.0765134803. The cubic root of 7643843420 is about 1969.8686144952.

The spelling of 7643843420 in words is "seven billion, six hundred forty-three million, eight hundred forty-three thousand, four hundred twenty".