3900642 has 8 divisors (see below), whose sum is σ = 7801296. Its totient is φ = 1300212.

The previous prime is 3900623. The next prime is 3900649. The reversal of 3900642 is 2460093.

3900642 is digitally balanced in base 2, because in such base 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.

3900642 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (3900649) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 325048 + ... + 325059.

It is an arithmetic number, because the mean of its divisors is an integer number (975162).

Almost surely, 2^3900642 is an apocalyptic number.

3900642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3900642 is a wasteful number, since it uses less digits than its factorization.

3900642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650112.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 3900642 is about 1975.0043037928. The cubic root of 3900642 is about 157.4147283440.

The spelling of 3900642 in words is "three million, nine hundred thousand, six hundred forty-two".