618870 has 48 divisors (see below), whose sum is σ = 1731888. Its totient is φ = 141120.

The previous prime is 618869. The next prime is 618883. The reversal of 618870 is 78816.

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

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 618870.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1260 + ... + 1680.

It is an arithmetic number, because the mean of its divisors is an integer number (36081).

2⁶¹⁸⁸⁷⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 618870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (865944).

618870 is an abundant number, since it is smaller than the sum of its proper divisors (1113018).

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

618870 is a wasteful number, since it uses less digits than its factorization.

618870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445 (or 438 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 618870 is about 786.6829094368. The cubic root of 618870 is about 85.2183543961.

The spelling of 618870 in words is "six hundred eighteen thousand, eight hundred seventy".