2842840 has 128 divisors (see below), whose sum is σ = 8709120. Its totient is φ = 806400.

The previous prime is 2842813. The next prime is 2842843. The reversal of 2842840 is 482482.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 2842799 and 2842808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2842843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40005 + ... + 40075.

It is an arithmetic number, because the mean of its divisors is an integer number (68040).

2^2842840 is an apocalyptic number.

2842840 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 2842840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4354560).

2842840 is an abundant number, since it is smaller than the sum of its proper divisors (5866280).

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

2842840 is a wasteful number, since it uses less digits than its factorization.

2842840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

The square root of 2842840 is about 1686.0723590641. The cubic root of 2842840 is about 141.6611639539.

The spelling of 2842840 in words is "two million, eight hundred forty-two thousand, eight hundred forty".