39809489 has 8 divisors (see below), whose sum is σ = 41459520. Its totient is φ = 38178000.

The previous prime is 39809477. The next prime is 39809491. The reversal of 39809489 is 98490893.

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 39809489 - 2⁸ = 39809233 is a prime.

It is a super-2 number, since 2×39809489² = 3169590828882242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39809449) 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, 167 + ... + 8924.

It is an arithmetic number, because the mean of its divisors is an integer number (5182440).

Almost surely, 2^39809489 is an apocalyptic number.

It is an amenable number.

39809489 is a deficient number, since it is larger than the sum of its proper divisors (1650031).

39809489 is a wasteful number, since it uses less digits than its factorization.

39809489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9271.

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 39809489 is about 6309.4761272232. The cubic root of 39809489 is about 341.4513763538.

The spelling of 39809489 in words is "thirty-nine million, eight hundred nine thousand, four hundred eighty-nine".