2840691 has 8 divisors (see below), whose sum is σ = 4328704. Its totient is φ = 1623240.

The previous prime is 2840689. The next prime is 2840699. The reversal of 2840691 is 1960482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2840691 - 2¹ = 2840689 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2840699) 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, 67615 + ... + 67656.

It is an arithmetic number, because the mean of its divisors is an integer number (541088).

2^2840691 is an apocalyptic number.

2840691 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2840691 is a deficient number, since it is larger than the sum of its proper divisors (1488013).

2840691 is a wasteful number, since it uses less digits than its factorization.

2840691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135281.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 2840691 is about 1685.4349586976. The cubic root of 2840691 is about 141.6254594491.

The spelling of 2840691 in words is "two million, eight hundred forty thousand, six hundred ninety-one".