2840838 has 96 divisors (see below), whose sum is σ = 7865088. Its totient is φ = 665280.

The previous prime is 2840801. The next prime is 2840857. The reversal of 2840838 is 8380482.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 2840799 and 2840808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 66045 + ... + 66087.

It is an arithmetic number, because the mean of its divisors is an integer number (81928).

2^2840838 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2840838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3932544).

2840838 is an abundant number, since it is smaller than the sum of its proper divisors (5024250).

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

2840838 is a wasteful number, since it uses less digits than its factorization.

2840838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90 (or 79 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 2840838 is about 1685.4785670545. The cubic root of 2840838 is about 141.6279023504.

The spelling of 2840838 in words is "two million, eight hundred forty thousand, eight hundred thirty-eight".