2780620 has 24 divisors (see below), whose sum is σ = 5983488. Its totient is φ = 1084800.

The previous prime is 2780599. The next prime is 2780621. The reversal of 2780620 is 260872.

It is not an unprimeable number, because it can be changed into a prime (2780621) 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, 876 + ... + 2515.

It is an arithmetic number, because the mean of its divisors is an integer number (249312).

2^2780620 is an apocalyptic number.

2780620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2780620 is an abundant number, since it is smaller than the sum of its proper divisors (3202868).

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

2780620 is a wasteful number, since it uses less digits than its factorization.

2780620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3441 (or 3439 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 2780620 is about 1667.5191153327. The cubic root of 2780620 is about 140.6200390019.

The spelling of 2780620 in words is "two million, seven hundred eighty thousand, six hundred twenty".