3904989645 has 8 divisors (see below), whose sum is σ = 6247983456. Its totient is φ = 2082661136.

The previous prime is 3904989623. The next prime is 3904989677. The reversal of 3904989645 is 5469894093.

It is a happy number.

3904989645 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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 3904989645 - 2⁶ = 3904989581 is a prime.

It is a super-4 number, since 4×3904989645⁴ (a number of 39 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130166307 + ... + 130166336.

It is an arithmetic number, because the mean of its divisors is an integer number (780997932).

Almost surely, 2^3904989645 is an apocalyptic number.

It is an amenable number.

3904989645 is a deficient number, since it is larger than the sum of its proper divisors (2342993811).

3904989645 is a wasteful number, since it uses less digits than its factorization.

3904989645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260332651.

The product of its (nonzero) digits is 8398080, while the sum is 57.

The square root of 3904989645 is about 62489.9163465595. The cubic root of 3904989645 is about 1574.7319130502.

The spelling of 3904989645 in words is "three billion, nine hundred four million, nine hundred eighty-nine thousand, six hundred forty-five".