3890000 has 50 divisors (see below), whose sum is σ = 9442290. Its totient is φ = 1552000.

The previous prime is 3889993. The next prime is 3890011. The reversal of 3890000 is 983.

It can be written as a sum of positive squares in 5 ways, for example, as 2062096 + 1827904 = 1436^2 + 1352^2 .

It is a tau number, because it is divible by the number of its divisors (50).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 9806 + ... + 10194.

Almost surely, 2^3890000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3890000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4721145).

3890000 is an abundant number, since it is smaller than the sum of its proper divisors (5552290).

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

3890000 is an equidigital number, since it uses as much as digits as its factorization.

3890000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417 (or 396 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 3890000 is about 1972.3082923316. The cubic root of 3890000 is about 157.2714413907.

Adding to 3890000 its reverse (983), we get a palindrome (3890983).

The spelling of 3890000 in words is "three million, eight hundred ninety thousand".