3890440 has 32 divisors (see below), whose sum is σ = 9216000. Its totient is φ = 1473984.

The previous prime is 3890431. The next prime is 3890503. The reversal of 3890440 is 440983.

3890440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 3890399 and 3890408.

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 in 7 ways as a sum of consecutive naturals, for example, 1800 + ... + 3319.

It is an arithmetic number, because the mean of its divisors is an integer number (288000).

Almost surely, 2^3890440 is an apocalyptic number.

It is an amenable number.

3890440 is an abundant number, since it is smaller than the sum of its proper divisors (5325560).

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

3890440 is a wasteful number, since it uses less digits than its factorization.

3890440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5149 (or 5145 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 3890440 is about 1972.4198336054. The cubic root of 3890440 is about 157.2773708530.

The spelling of 3890440 in words is "three million, eight hundred ninety thousand, four hundred forty".