43998009 has 8 divisors (see below), whose sum is σ = 63997152. Its totient is φ = 26665440.

The previous prime is 43998001. The next prime is 43998037. The reversal of 43998009 is 90089934.

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

It is not a de Polignac number, because 43998009 - 2³ = 43998001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43998001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 666604 + ... + 666669.

It is an arithmetic number, because the mean of its divisors is an integer number (7999644).

Almost surely, 2^43998009 is an apocalyptic number.

It is an amenable number.

43998009 is a deficient number, since it is larger than the sum of its proper divisors (19999143).

43998009 is a wasteful number, since it uses less digits than its factorization.

43998009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333287.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 43998009 is about 6633.0995017412. The cubic root of 43998009 is about 353.0295085102.

The spelling of 43998009 in words is "forty-three million, nine hundred ninety-eight thousand, nine".