1903420 has 24 divisors (see below), whose sum is σ = 4208400. Its totient is φ = 721152.

The previous prime is 1903409. The next prime is 1903441. The reversal of 1903420 is 243091.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 2125 + ... + 2884.

It is an arithmetic number, because the mean of its divisors is an integer number (175350).

2^1903420 is an apocalyptic number.

1903420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1903420 is an abundant number, since it is smaller than the sum of its proper divisors (2304980).

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

1903420 is a wasteful number, since it uses less digits than its factorization.

1903420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5037 (or 5035 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1903420 is about 1379.6448818446. The cubic root of 1903420 is about 123.9305021591.

The spelling of 1903420 in words is "one million, nine hundred three thousand, four hundred twenty".