2840709 has 24 divisors (see below), whose sum is σ = 4157472. Its totient is φ = 1723680.

The previous prime is 2840699. The next prime is 2840723. The reversal of 2840709 is 9070482.

It is not a de Polignac number, because 2840709 - 2¹⁶ = 2775173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2840759) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46539 + ... + 46599.

It is an arithmetic number, because the mean of its divisors is an integer number (173228).

2^2840709 is an apocalyptic number.

It is an amenable number.

2840709 is a deficient number, since it is larger than the sum of its proper divisors (1316763).

2840709 is a wasteful number, since it uses less digits than its factorization.

2840709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 2840709 is about 1685.4402985570. The cubic root of 2840709 is about 141.6257585844.

The spelling of 2840709 in words is "two million, eight hundred forty thousand, seven hundred nine".