2840401 has 4 divisors (see below), whose sum is σ = 2847600. Its totient is φ = 2833204.

The previous prime is 2840393. The next prime is 2840417. The reversal of 2840401 is 1040482.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1040482 = 2 ⋅520241.

It is a cyclic number.

It is not a de Polignac number, because 2840401 - 2³ = 2840393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2840801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2971 + ... + 3808.

It is an arithmetic number, because the mean of its divisors is an integer number (711900).

2^2840401 is an apocalyptic number.

It is an amenable number.

2840401 is a deficient number, since it is larger than the sum of its proper divisors (7199).

2840401 is an equidigital number, since it uses as much as digits as its factorization.

2840401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7198.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 2840401 is about 1685.3489252971. The cubic root of 2840401 is about 141.6206398728.

Adding to 2840401 its reverse (1040482), we get a palindrome (3880883).

The spelling of 2840401 in words is "two million, eight hundred forty thousand, four hundred one".