2840000 has 70 divisors (see below), whose sum is σ = 7141464. Its totient is φ = 1120000.

The previous prime is 2839981. The next prime is 2840023. The reversal of 2840000 is 482.

It is an Ulam number.

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, 39965 + ... + 40035.

2^2840000 is an apocalyptic number.

2840000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2840000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3570732).

2840000 is an abundant number, since it is smaller than the sum of its proper divisors (4301464).

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

2840000 is an frugal number, since it uses more digits than its factorization.

2840000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2840000 is about 1685.2299546353. The cubic root of 2840000 is about 141.6139750217.

Adding to 2840000 its reverse (482), we get a palindrome (2840482).

The spelling of 2840000 in words is "two million, eight hundred forty thousand".