43440397810489 has 9 divisors (see below), whose sum is σ = 43760705097837. Its totient is φ = 43122418247904.

The previous prime is 43440397810429. The next prime is 43440397810517. The reversal of 43440397810489 is 98401879304434.

The square root of 43440397810489 is 6590933.

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

It can be written as a sum of positive squares in 4 ways, for example, as 920764989225 + 42519632821264 = 959565^2 + 6520708^2 .

It is a de Polignac number, because none of the positive numbers 2^k-43440397810489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43440397810489.

It is not an unprimeable number, because it can be changed into a prime (43440397810429) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 902933767 + ... + 902981875.

Almost surely, 2^{43440397810489} is an apocalyptic number.

43440397810489 is the 6590933-rd square number.

43440397810489 is the 3295467-th centered octagonal number.

It is an amenable number.

43440397810489 is a deficient number, since it is larger than the sum of its proper divisors (320307287348).

43440397810489 is an frugal number, since it uses more digits than its factorization.

43440397810489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96492 (or 48246 counting only the distinct ones).

The product of its (nonzero) digits is 83607552, while the sum is 64.

The spelling of 43440397810489 in words is "forty-three trillion, four hundred forty billion, three hundred ninety-seven million, eight hundred ten thousand, four hundred eighty-nine".