43898839921 has 8 divisors (see below), whose sum is σ = 47458206080. Its totient is φ = 40464363888.

The previous prime is 43898839891. The next prime is 43898839927. The reversal of 43898839921 is 12993889834.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 43898839921 - 2¹³ = 43898831729 is a prime.

It is the 209521-st Hogben number.

It is not an unprimeable number, because it can be changed into a prime (43898839927) by changing a digit.

It is a nontrivial repunit in base 209520.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31221801 + ... + 31223206.

It is an arithmetic number, because the mean of its divisors is an integer number (5932275760).

Almost surely, 2^43898839921 is an apocalyptic number.

It is an amenable number.

43898839921 is a deficient number, since it is larger than the sum of its proper divisors (3559366159).

43898839921 is a wasteful number, since it uses less digits than its factorization.

43898839921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62445063.

The product of its digits is 26873856, while the sum is 64.

The spelling of 43898839921 in words is "forty-three billion, eight hundred ninety-eight million, eight hundred thirty-nine thousand, nine hundred twenty-one".