1906428 has 24 divisors (see below), whose sum is σ = 4506880. Its totient is φ = 627120.

The previous prime is 1906417. The next prime is 1906439. The reversal of 1906428 is 8246091.

It is an interprime number because it is at equal distance from previous prime (1906417) and next prime (1906439).

It is a junction number, because it is equal to n+sod(n) for n = 1906395 and 1906404.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58 + ... + 1953.

2^1906428 is an apocalyptic number.

It is an amenable number.

1906428 is an abundant number, since it is smaller than the sum of its proper divisors (2600452).

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

1906428 is a wasteful number, since it uses less digits than its factorization.

1906428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2097 (or 2095 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1906428 is about 1380.7345870949. The cubic root of 1906428 is about 123.9957508083.

The spelling of 1906428 in words is "one million, nine hundred six thousand, four hundred twenty-eight".