3900784 has 10 divisors (see below), whose sum is σ = 7557800. Its totient is φ = 1950384.

The previous prime is 3900779. The next prime is 3900817. The reversal of 3900784 is 4870093.

It is a happy number.

3900784 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×3900784³ (a number of 21 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121884 + ... + 121915.

It is an arithmetic number, because the mean of its divisors is an integer number (755780).

Almost surely, 2^3900784 is an apocalyptic number.

It is an amenable number.

3900784 is a deficient number, since it is larger than the sum of its proper divisors (3657016).

3900784 is a wasteful number, since it uses less digits than its factorization.

3900784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243807 (or 243801 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 3900784 is about 1975.0402527544. The cubic root of 3900784 is about 157.4166385099.

The spelling of 3900784 in words is "three million, nine hundred thousand, seven hundred eighty-four".