43689490 has 64 divisors (see below), whose sum is σ = 91609056. Its totient is φ = 14856192.

The previous prime is 43689487. The next prime is 43689511. The reversal of 43689490 is 9498634.

It can be written as a sum of positive squares in 16 ways, for example, as 6953769 + 36735721 = 2637^2 + 6061^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116944 + ... + 117316.

Almost surely, 2^43689490 is an apocalyptic number.

43689490 is an abundant number, since it is smaller than the sum of its proper divisors (47919566).

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

43689490 is a wasteful number, since it uses less digits than its factorization.

43689490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 43689490 is about 6609.8025689123. The cubic root of 43689490 is about 352.2024113481.

The spelling of 43689490 in words is "forty-three million, six hundred eighty-nine thousand, four hundred ninety".