3900890 has 48 divisors (see below), whose sum is σ = 8618400. Its totient is φ = 1264032.

The previous prime is 3900887. The next prime is 3900893. The reversal of 3900890 is 980093.

It is an interprime number because it is at equal distance from previous prime (3900887) and next prime (3900893).

It is not an unprimeable number, because it can be changed into a prime (3900893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9101 + ... + 9519.

It is an arithmetic number, because the mean of its divisors is an integer number (179550).

Almost surely, 2^3900890 is an apocalyptic number.

3900890 is an abundant number, since it is smaller than the sum of its proper divisors (4717510).

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

3900890 is a wasteful number, since it uses less digits than its factorization.

3900890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459 (or 452 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 3900890 is about 1975.0670874682. The cubic root of 3900890 is about 157.4180643782.

The spelling of 3900890 in words is "three million, nine hundred thousand, eight hundred ninety".