3889820 has 24 divisors (see below), whose sum is σ = 8911728. Its totient is φ = 1414400.

The previous prime is 3889817. The next prime is 3889843. The reversal of 3889820 is 289883.

3889820 = T₆₇ + T₆₈ + ... + T₂₈₆.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8621 + ... + 9060.

It is an arithmetic number, because the mean of its divisors is an integer number (371322).

Almost surely, 2^3889820 is an apocalyptic number.

It is an amenable number.

3889820 is an abundant number, since it is smaller than the sum of its proper divisors (5021908).

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

3889820 is a wasteful number, since it uses less digits than its factorization.

3889820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17701 (or 17699 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 3889820 is about 1972.2626599923. The cubic root of 3889820 is about 157.2690155727.

The spelling of 3889820 in words is "three million, eight hundred eighty-nine thousand, eight hundred twenty".