43394821268 has 12 divisors (see below), whose sum is σ = 75968661972. Its totient is φ = 21689489280.

The previous prime is 43394821237. The next prime is 43394821277. The reversal of 43394821268 is 86212849334.

It can be written as a sum of positive squares in 2 ways, for example, as 28982338564 + 14412482704 = 170242^2 + 120052^2 .

It is a super-2 number, since 2×43394821268² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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, 1968005 + ... + 1989932.

It is an arithmetic number, because the mean of its divisors is an integer number (6330721831).

Almost surely, 2^43394821268 is an apocalyptic number.

It is an amenable number.

43394821268 is a deficient number, since it is larger than the sum of its proper divisors (32573840704).

43394821268 is a wasteful number, since it uses less digits than its factorization.

43394821268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3960682 (or 3960680 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 50.

The spelling of 43394821268 in words is "forty-three billion, three hundred ninety-four million, eight hundred twenty-one thousand, two hundred sixty-eight".