2782130 has 16 divisors (see below), whose sum is σ = 5393304. Its totient is φ = 1027200.

The previous prime is 2782127. The next prime is 2782139. The reversal of 2782130 is 312872.

It can be written as a sum of positive squares in 4 ways, for example, as 1315609 + 1466521 = 1147^2 + 1211^2 .

It is a Curzon number.

It is a nialpdrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 2782096 and 2782105.

It is not an unprimeable number, because it can be changed into a prime (2782139) 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, 10571 + ... + 10830.

2^2782130 is an apocalyptic number.

2782130 is a deficient number, since it is larger than the sum of its proper divisors (2611174).

2782130 is a wasteful number, since it uses less digits than its factorization.

2782130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21421.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 2782130 is about 1667.9718223040. The cubic root of 2782130 is about 140.6454887019.

The spelling of 2782130 in words is "two million, seven hundred eighty-two thousand, one hundred thirty".