1906420 has 24 divisors (see below), whose sum is σ = 4032000. Its totient is φ = 757152.

The previous prime is 1906417. The next prime is 1906439. The reversal of 1906420 is 246091.

It is a junction number, because it is equal to n+sod(n) for n = 1906391 and 1906400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3741 + ... + 4219.

It is an arithmetic number, because the mean of its divisors is an integer number (168000).

2^1906420 is an apocalyptic number.

1906420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1906420 is an abundant number, since it is smaller than the sum of its proper divisors (2125580).

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

1906420 is a wasteful number, since it uses less digits than its factorization.

1906420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687 (or 685 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1906420 is about 1380.7316900832. The cubic root of 1906420 is about 123.9955773657.

The spelling of 1906420 in words is "one million, nine hundred six thousand, four hundred twenty".