43945385220 has 240 divisors, whose sum is σ = 159238493568. Its totient is φ = 10026685440.

The previous prime is 43945385189. The next prime is 43945385251. The reversal of 43945385220 is 2258354934.

43945385220 is a `hidden beast` number, since 4 + 3 + 9 + 45 + 385 + 220 = 666.

It is an interprime number because it is at equal distance from previous prime (43945385189) and next prime (43945385251).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 230409 + ... + 375471.

Almost surely, 2^43945385220 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 43945385220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79619246784).

43945385220 is an abundant number, since it is smaller than the sum of its proper divisors (115293108348).

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

43945385220 is a wasteful number, since it uses less digits than its factorization.

43945385220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145112 (or 145101 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

The spelling of 43945385220 in words is "forty-three billion, nine hundred forty-five million, three hundred eighty-five thousand, two hundred twenty".