43838765428 has 6 divisors (see below), whose sum is σ = 76717839506. Its totient is φ = 21919382712.

The previous prime is 43838765393. The next prime is 43838765429. The reversal of 43838765428 is 82456783834.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 30927443044 + 12911322384 = 175862^2 + 113628^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43838765429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5479845675 + ... + 5479845682.

Almost surely, 2^43838765428 is an apocalyptic number.

It is an amenable number.

43838765428 is a deficient number, since it is larger than the sum of its proper divisors (32879074078).

43838765428 is a wasteful number, since it uses less digits than its factorization.

43838765428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10959691361 (or 10959691359 counting only the distinct ones).

The product of its digits is 30965760, while the sum is 58.

The spelling of 43838765428 in words is "forty-three billion, eight hundred thirty-eight million, seven hundred sixty-five thousand, four hundred twenty-eight".