2047780 has 24 divisors (see below), whose sum is σ = 4915008. Its totient is φ = 702048.

The previous prime is 2047741. The next prime is 2047781. The reversal of 2047780 is 877402.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (2047781) 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 7 ways as a sum of consecutive naturals, for example, 7174 + ... + 7453.

It is an arithmetic number, because the mean of its divisors is an integer number (204792).

2^2047780 is an apocalyptic number.

2047780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2047780 is an abundant number, since it is smaller than the sum of its proper divisors (2867228).

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

2047780 is a wasteful number, since it uses less digits than its factorization.

2047780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14643 (or 14641 counting only the distinct ones).

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

The square root of 2047780 is about 1431.0066386988. The cubic root of 2047780 is about 126.9875367520.

The spelling of 2047780 in words is "two million, forty-seven thousand, seven hundred eighty".