1906424 has 32 divisors (see below), whose sum is σ = 4021920. Its totient is φ = 840576.

The previous prime is 1906417. The next prime is 1906439. The reversal of 1906424 is 4246091.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 1906393 and 1906402.

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, 1994 + ... + 2790.

It is an arithmetic number, because the mean of its divisors is an integer number (125685).

2^1906424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1906424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2010960).

1906424 is an abundant number, since it is smaller than the sum of its proper divisors (2115496).

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

1906424 is a wasteful number, since it uses less digits than its factorization.

1906424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839 (or 835 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1906424 is about 1380.7331385898. The cubic root of 1906424 is about 123.9956640870.

The spelling of 1906424 in words is "one million, nine hundred six thousand, four hundred twenty-four".