2840397 has 8 divisors (see below), whose sum is σ = 4328256. Its totient is φ = 1623072.

The previous prime is 2840393. The next prime is 2840417. The reversal of 2840397 is 7930482.

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

It is not a de Polignac number, because 2840397 - 2² = 2840393 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67608 + ... + 67649.

It is an arithmetic number, because the mean of its divisors is an integer number (541032).

2^2840397 is an apocalyptic number.

It is an amenable number.

2840397 is a deficient number, since it is larger than the sum of its proper divisors (1487859).

2840397 is a wasteful number, since it uses less digits than its factorization.

2840397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135267.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 2840397 is about 1685.3477385988. The cubic root of 2840397 is about 141.6205733936.

The spelling of 2840397 in words is "two million, eight hundred forty thousand, three hundred ninety-seven".