1859406 has 16 divisors (see below), whose sum is σ = 3805824. Its totient is φ = 605304.

The previous prime is 1859387. The next prime is 1859441. The reversal of 1859406 is 6049581.

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, 3346 + ... + 3861.

It is an arithmetic number, because the mean of its divisors is an integer number (237864).

2^1859406 is an apocalyptic number.

1859406 is an abundant number, since it is smaller than the sum of its proper divisors (1946418).

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

1859406 is a wasteful number, since it uses less digits than its factorization.

1859406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7255.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 1859406 is about 1363.6003813434. The cubic root of 1859406 is about 122.9678017380.

It can be divided in two parts, 185 and 9406, that added together give a triangular number (9591 = T₁₃₈).

The spelling of 1859406 in words is "one million, eight hundred fifty-nine thousand, four hundred six".