1858164 has 48 divisors (see below), whose sum is σ = 5408256. Its totient is φ = 482400.

The previous prime is 1858163. The next prime is 1858169. The reversal of 1858164 is 4618581.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1858163) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 82 + ... + 1929.

It is an arithmetic number, because the mean of its divisors is an integer number (112672).

2^1858164 is an apocalyptic number.

1858164 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1858164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2704128).

1858164 is an abundant number, since it is smaller than the sum of its proper divisors (3550092).

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

1858164 is a wasteful number, since it uses less digits than its factorization.

1858164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2036 (or 2034 counting only the distinct ones).

The product of its digits is 7680, while the sum is 33.

The square root of 1858164 is about 1363.1448932524. The cubic root of 1858164 is about 122.9404166435.

The spelling of 1858164 in words is "one million, eight hundred fifty-eight thousand, one hundred sixty-four".