2782345 has 8 divisors (see below), whose sum is σ = 3354120. Its totient is φ = 2215680.

The previous prime is 2782337. The next prime is 2782349. The reversal of 2782345 is 5432872.

It can be written as a sum of positive squares in 4 ways, for example, as 984064 + 1798281 = 992^2 + 1341^2 .

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

It is not a de Polignac number, because 2782345 - 2³ = 2782337 is a prime.

It is a d-powerful number, because it can be written as 2¹³ + 7² + 8 + 2¹⁷ + 3¹³ + 4¹⁰ + 5³ .

It is not an unprimeable number, because it can be changed into a prime (2782349) 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, 51 + ... + 2359.

It is an arithmetic number, because the mean of its divisors is an integer number (419265).

2^2782345 is an apocalyptic number.

It is an amenable number.

2782345 is a deficient number, since it is larger than the sum of its proper divisors (571775).

2782345 is a wasteful number, since it uses less digits than its factorization.

2782345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2555.

The product of its digits is 13440, while the sum is 31.

The square root of 2782345 is about 1668.0362705889. The cubic root of 2782345 is about 140.6491115858.

The spelling of 2782345 in words is "two million, seven hundred eighty-two thousand, three hundred forty-five".