1606840 has 48 divisors (see below), whose sum is σ = 3868200. Its totient is φ = 600576.

The previous prime is 1606837. The next prime is 1606841. The reversal of 1606840 is 486061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1606841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11491 + ... + 11629.

2^1606840 is an apocalyptic number.

1606840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1606840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1934100).

1606840 is an abundant number, since it is smaller than the sum of its proper divisors (2261360).

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

1606840 is a wasteful number, since it uses less digits than its factorization.

1606840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 163 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 1606840 is about 1267.6119279969. The cubic root of 1606840 is about 117.1271415987.

It can be divided in two parts, 1 and 606840, that added together give a square (606841 = 779²).

The spelling of 1606840 in words is "one million, six hundred six thousand, eight hundred forty".