2786401 has 4 divisors (see below), whose sum is σ = 2854404. Its totient is φ = 2718400.

The previous prime is 2786389. The next prime is 2786411. The reversal of 2786401 is 1046872.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1498176 + 1288225 = 1224^2 + 1135^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2786401 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2786401.

It is not an unprimeable number, because it can be changed into a prime (2786411) 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, 33940 + ... + 34021.

It is an arithmetic number, because the mean of its divisors is an integer number (713601).

2^2786401 is an apocalyptic number.

It is an amenable number.

2786401 is a deficient number, since it is larger than the sum of its proper divisors (68003).

2786401 is an equidigital number, since it uses as much as digits as its factorization.

2786401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68002.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 2786401 is about 1669.2516287247. The cubic root of 2786401 is about 140.7174227664.

The spelling of 2786401 in words is "two million, seven hundred eighty-six thousand, four hundred one".