2085780 has 24 divisors (see below), whose sum is σ = 5840352. Its totient is φ = 556192.

The previous prime is 2085779. The next prime is 2085799. The reversal of 2085780 is 875802.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

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, 17322 + ... + 17441.

It is an arithmetic number, because the mean of its divisors is an integer number (243348).

2^2085780 is an apocalyptic number.

2085780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2085780 is an abundant number, since it is smaller than the sum of its proper divisors (3754572).

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

2085780 is a wasteful number, since it uses less digits than its factorization.

2085780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34775 (or 34773 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 2085780 is about 1444.2229744745. Note that the first 3 decimals coincide. The cubic root of 2085780 is about 127.7682166059.

The spelling of 2085780 in words is "two million, eighty-five thousand, seven hundred eighty".