1858420 has 12 divisors (see below), whose sum is σ = 3902724. Its totient is φ = 743360.

The previous prime is 1858403. The next prime is 1858421. The reversal of 1858420 is 248581.

It can be written as a sum of positive squares in 2 ways, for example, as 209764 + 1648656 = 458^2 + 1284^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1858421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46441 + ... + 46480.

It is an arithmetic number, because the mean of its divisors is an integer number (325227).

2^1858420 is an apocalyptic number.

1858420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1858420 is an abundant number, since it is smaller than the sum of its proper divisors (2044304).

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

1858420 is a wasteful number, since it uses less digits than its factorization.

1858420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92930 (or 92928 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 1858420 is about 1363.2387905279. The cubic root of 1858420 is about 122.9460622344.

It can be divided in two parts, 1858 and 420, that added together give a triangular number (2278 = T₆₇).

The spelling of 1858420 in words is "one million, eight hundred fifty-eight thousand, four hundred twenty".