2780082 has 30 divisors (see below), whose sum is σ = 6277359. Its totient is φ = 919620.

The previous prime is 2780077. The next prime is 2780083. The reversal of 2780082 is 2800872.

It can be written as a sum of positive squares in only one way, i.e., 1390041 + 1390041 = 1179^2 + 1179^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=1179.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2780083) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 21157 + ... + 21287.

2^2780082 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2780082

2780082 is an abundant number, since it is smaller than the sum of its proper divisors (3497277).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2780082 is an equidigital number, since it uses as much as digits as its factorization.

2780082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 2780082 is about 1667.3577900379. The cubic root of 2780082 is about 140.6109692668.

The spelling of 2780082 in words is "two million, seven hundred eighty thousand, eighty-two".