2770840 has 32 divisors (see below), whose sum is σ = 6356880. Its totient is φ = 1086592.

The previous prime is 2770829. The next prime is 2770841. The reversal of 2770840 is 480772.

It is a junction number, because it is equal to n+sod(n) for n = 2770799 and 2770808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2770841) 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, 1467 + ... + 2773.

2^2770840 is an apocalyptic number.

2770840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2770840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3178440).

2770840 is an abundant number, since it is smaller than the sum of its proper divisors (3586040).

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

2770840 is a wasteful number, since it uses less digits than its factorization.

2770840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1371 (or 1367 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 2770840 is about 1664.5840321233. The cubic root of 2770840 is about 140.4549823480.

The spelling of 2770840 in words is "two million, seven hundred seventy thousand, eight hundred forty".