43820304889 has 3 divisors (see below), whose sum is σ = 43820514223. Its totient is φ = 43820095556.

The previous prime is 43820304839. The next prime is 43820304893. The reversal of 43820304889 is 98840302834.

The square root of 43820304889 is 209333.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 43415973225 + 404331664 = 208365^2 + 20108^2 .

It is not a de Polignac number, because 43820304889 - 2¹⁵ = 43820272121 is a prime.

It is a super-4 number, since 4×43820304889⁴ (a number of 44 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43820304839) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 104667 + ... + 313999.

Almost surely, 2^43820304889 is an apocalyptic number.

43820304889 is the 209333-rd square number.

43820304889 is the 104667-th centered octagonal number.

It is an amenable number.

43820304889 is a deficient number, since it is larger than the sum of its proper divisors (209334).

43820304889 is an frugal number, since it uses more digits than its factorization.

43820304889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418666 (or 209333 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 49.

Multiplying 43820304889 by its sum of digits (49), we get a square (2147194939561 = 1465331²).

The spelling of 43820304889 in words is "forty-three billion, eight hundred twenty million, three hundred four thousand, eight hundred eighty-nine".