2775980 has 12 divisors (see below), whose sum is σ = 5829600. Its totient is φ = 1110384.

The previous prime is 2775959. The next prime is 2775989. The reversal of 2775980 is 895772.

It is not an unprimeable number, because it can be changed into a prime (2775989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69380 + ... + 69419.

It is an arithmetic number, because the mean of its divisors is an integer number (485800).

2^2775980 is an apocalyptic number.

2775980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2775980 is an abundant number, since it is smaller than the sum of its proper divisors (3053620).

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

2775980 is a wasteful number, since it uses less digits than its factorization.

2775980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138808 (or 138806 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 38.

The square root of 2775980 is about 1666.1272460409. The cubic root of 2775980 is about 140.5417782489.

The spelling of 2775980 in words is "two million, seven hundred seventy-five thousand, nine hundred eighty".