40004989 has 8 divisors (see below), whose sum is σ = 40538880. Its totient is φ = 39474000.

The previous prime is 40004977. The next prime is 40004999. The reversal of 40004989 is 98940004.

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

It is a cyclic number.

It is not a de Polignac number, because 40004989 - 2¹³ = 39996797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40004969) 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, 43072 + ... + 43990.

It is an arithmetic number, because the mean of its divisors is an integer number (5067360).

Almost surely, 2^40004989 is an apocalyptic number.

It is an amenable number.

40004989 is a deficient number, since it is larger than the sum of its proper divisors (533891).

40004989 is a wasteful number, since it uses less digits than its factorization.

40004989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 40004989 is about 6324.9497231203. The cubic root of 40004989 is about 342.0094071942.

The spelling of 40004989 in words is "forty million, four thousand, nine hundred eighty-nine".