43043420640 has 576 divisors, whose sum is σ = 162152928000. Its totient is φ = 9485107200.

The previous prime is 43043420621. The next prime is 43043420687. The reversal of 43043420640 is 4602434034.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 43043420598 and 43043420607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 86259111 + ... + 86259609.

It is an arithmetic number, because the mean of its divisors is an integer number (281515500).

Almost surely, 2^43043420640 is an apocalyptic number.

43043420640 is a gapful number since it is divisible by the number (40) 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 43043420640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81076464000).

43043420640 is an abundant number, since it is smaller than the sum of its proper divisors (119109507360).

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

43043420640 is a wasteful number, since it uses less digits than its factorization.

43043420640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607 (or 568 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 43043420640 its reverse (4602434034), we get a palindrome (47645854674).

The spelling of 43043420640 in words is "forty-three billion, forty-three million, four hundred twenty thousand, six hundred forty".