43913478820 has 48 divisors (see below), whose sum is σ = 92829745008. Its totient is φ = 17449205760.

The previous prime is 43913478797. The next prime is 43913478881. The reversal of 43913478820 is 2887431934.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 691900416 + 43221578404 = 26304^2 + 207898^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2643340 + ... + 2659900.

It is an arithmetic number, because the mean of its divisors is an integer number (1933953021).

Almost surely, 2^43913478820 is an apocalyptic number.

It is an amenable number.

43913478820 is an abundant number, since it is smaller than the sum of its proper divisors (48916266188).

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

43913478820 is a wasteful number, since it uses less digits than its factorization.

43913478820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17440 (or 17438 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 49.

The spelling of 43913478820 in words is "forty-three billion, nine hundred thirteen million, four hundred seventy-eight thousand, eight hundred twenty".