43743720442 has 8 divisors (see below), whose sum is σ = 69475320756. Its totient is φ = 20585280192.

The previous prime is 43743720439. The next prime is 43743720487. The reversal of 43743720442 is 24402734734.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 42192857281 + 1550863161 = 205409^2 + 39381^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 43743720395 and 43743720404.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 643289973 + ... + 643290040.

Almost surely, 2^43743720442 is an apocalyptic number.

43743720442 is a deficient number, since it is larger than the sum of its proper divisors (25731600314).

43743720442 is a wasteful number, since it uses less digits than its factorization.

43743720442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286580032.

The product of its (nonzero) digits is 451584, while the sum is 40.

The spelling of 43743720442 in words is "forty-three billion, seven hundred forty-three million, seven hundred twenty thousand, four hundred forty-two".