2840778 has 32 divisors (see below), whose sum is σ = 6520320. Its totient is φ = 915840.

The previous prime is 2840777. The next prime is 2840779. The reversal of 2840778 is 8770482.

2840778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2840777) and next prime (2840779).

It is not an unprimeable number, because it can be changed into a prime (2840771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 826 + ... + 2522.

It is an arithmetic number, because the mean of its divisors is an integer number (203760).

2^2840778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2840778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3260160).

2840778 is an abundant number, since it is smaller than the sum of its proper divisors (3679542).

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

2840778 is a wasteful number, since it uses less digits than its factorization.

2840778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1739 (or 1733 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The square root of 2840778 is about 1685.4607678614. The cubic root of 2840778 is about 141.6269052580.

The spelling of 2840778 in words is "two million, eight hundred forty thousand, seven hundred seventy-eight".