2840390 has 16 divisors (see below), whose sum is σ = 5843232. Its totient is φ = 973824.

The previous prime is 2840359. The next prime is 2840393. The reversal of 2840390 is 930482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2840393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20219 + ... + 20358.

It is an arithmetic number, because the mean of its divisors is an integer number (365202).

2^2840390 is an apocalyptic number.

2840390 is an abundant number, since it is smaller than the sum of its proper divisors (3002842).

2840390 is a wasteful number, since it uses less digits than its factorization.

2840390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40591.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 2840390 is about 1685.3456618747. The cubic root of 2840390 is about 141.6204570548.

The spelling of 2840390 in words is "two million, eight hundred forty thousand, three hundred ninety".