1868420 has 24 divisors (see below), whose sum is σ = 3966144. Its totient is φ = 739296.

The previous prime is 1868407. The next prime is 1868423. The reversal of 1868420 is 248681.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1868423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1607 + ... + 2513.

It is an arithmetic number, because the mean of its divisors is an integer number (165256).

2^1868420 is an apocalyptic number.

1868420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1868420 is an abundant number, since it is smaller than the sum of its proper divisors (2097724).

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

1868420 is a wasteful number, since it uses less digits than its factorization.

1868420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1019 (or 1017 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 1868420 is about 1366.9016058225. The cubic root of 1868420 is about 123.1661886470.

It can be divided in two parts, 18684 and 20, that multiplied together give a triangular number (373680 = T₈₆₄).

The spelling of 1868420 in words is "one million, eight hundred sixty-eight thousand, four hundred twenty".