1853940 has 72 divisors (see below), whose sum is σ = 5771808. Its totient is φ = 440960.

The previous prime is 1853939. The next prime is 1853947. The reversal of 1853940 is 493581.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

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

It is a junction number, because it is equal to n+sod(n) for n = 1853898 and 1853907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1853947) 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 23 ways as a sum of consecutive naturals, for example, 34954 + ... + 35006.

It is an arithmetic number, because the mean of its divisors is an integer number (80164).

2^1853940 is an apocalyptic number.

1853940 is a gapful number since it is divisible by the number (10) 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 1853940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2885904).

1853940 is an abundant number, since it is smaller than the sum of its proper divisors (3917868).

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

1853940 is a wasteful number, since it uses less digits than its factorization.

1853940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129 (or 74 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1853940 is about 1361.5946533385. The cubic root of 1853940 is about 122.8471894380.

The spelling of 1853940 in words is "one million, eight hundred fifty-three thousand, nine hundred forty".