2780124 has 12 divisors (see below), whose sum is σ = 6486984. Its totient is φ = 926704.

The previous prime is 2780123. The next prime is 2780131. The reversal of 2780124 is 4210872.

2780124 = 586² + 587² + ... + 593².

It is a tau number, because it is divible by the number of its divisors (12).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2780094 and 2780103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2780123) 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 3 ways as a sum of consecutive naturals, for example, 115827 + ... + 115850.

It is an arithmetic number, because the mean of its divisors is an integer number (540582).

2^2780124 is an apocalyptic number.

It is an amenable number.

2780124 is an abundant number, since it is smaller than the sum of its proper divisors (3706860).

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

2780124 is a wasteful number, since it uses less digits than its factorization.

2780124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231684 (or 231682 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 2780124 is about 1667.3703847676. The cubic root of 2780124 is about 140.6116773552.

Adding to 2780124 its reverse (4210872), we get a palindrome (6990996).

The spelling of 2780124 in words is "two million, seven hundred eighty thousand, one hundred twenty-four".