849780 has 36 divisors (see below), whose sum is σ = 2578212. Its totient is φ = 226560.

The previous prime is 849773. The next prime is 849829. The reversal of 849780 is 87948.

It can be written as a sum of positive squares in 2 ways, for example, as 381924 + 467856 = 618^2 + 684^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

849780 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 11 ways as a sum of consecutive naturals, for example, 2181 + ... + 2540.

It is an arithmetic number, because the mean of its divisors is an integer number (71617).

2⁸⁴⁹⁷⁸⁰ is an apocalyptic number.

It is an amenable number.

849780 is an abundant number, since it is smaller than the sum of its proper divisors (1728432).

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

849780 is a wasteful number, since it uses less digits than its factorization.

849780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4736 (or 4731 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 849780 is about 921.8351262563. The cubic root of 849780 is about 94.7186505031.

The spelling of 849780 in words is "eight hundred forty-nine thousand, seven hundred eighty".