43090689640 has 32 divisors (see below), whose sum is σ = 98783378280. Its totient is φ = 16911062272.

The previous prime is 43090689583. The next prime is 43090689647. The reversal of 43090689640 is 4698609034.

It can be written as a sum of positive squares in 4 ways, for example, as 42954220516 + 136469124 = 207254^2 + 11682^2 .

It is a super-3 number, since 3×43090689640³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (43090689647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10160779 + ... + 10165018.

Almost surely, 2^43090689640 is an apocalyptic number.

43090689640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43090689640 is an abundant number, since it is smaller than the sum of its proper divisors (55692688640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

43090689640 is a wasteful number, since it uses less digits than its factorization.

43090689640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20325861 (or 20325857 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 49.

The spelling of 43090689640 in words is "forty-three billion, ninety million, six hundred eighty-nine thousand, six hundred forty".