39904769 has 8 divisors (see below), whose sum is σ = 42598080. Its totient is φ = 37270800.

The previous prime is 39904703. The next prime is 39904771. The reversal of 39904769 is 96740993.

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 39904769 - 2²⁰ = 38856193 is a prime.

It is a super-2 number, since 2×39904769² = 3184781177886722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (39904789) 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, 13442 + ... + 16139.

It is an arithmetic number, because the mean of its divisors is an integer number (5324760).

Almost surely, 2^39904769 is an apocalyptic number.

It is an amenable number.

39904769 is a deficient number, since it is larger than the sum of its proper divisors (2693311).

39904769 is a wasteful number, since it uses less digits than its factorization.

39904769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29671.

The product of its (nonzero) digits is 367416, while the sum is 47.

The square root of 39904769 is about 6317.0221623800. The cubic root of 39904769 is about 341.7235691333.

The spelling of 39904769 in words is "thirty-nine million, nine hundred four thousand, seven hundred sixty-nine".