2077780 has 12 divisors (see below), whose sum is σ = 4363380. Its totient is φ = 831104.

The previous prime is 2077771. The next prime is 2077781. The reversal of 2077780 is 877702.

It can be written as a sum of positive squares in 2 ways, for example, as 1085764 + 992016 = 1042^2 + 996^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2077781) 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, 51925 + ... + 51964.

It is an arithmetic number, because the mean of its divisors is an integer number (363615).

2^2077780 is an apocalyptic number.

2077780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2077780 is an abundant number, since it is smaller than the sum of its proper divisors (2285600).

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

2077780 is a wasteful number, since it uses less digits than its factorization.

2077780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103898 (or 103896 counting only the distinct ones).

The product of its (nonzero) digits is 5488, while the sum is 31.

The square root of 2077780 is about 1441.4506581913. The cubic root of 2077780 is about 127.6046558378.

The spelling of 2077780 in words is "two million, seventy-seven thousand, seven hundred eighty".