1613844 has 60 divisors (see below), whose sum is σ = 4482324. Its totient is φ = 504576.

The previous prime is 1613831. The next prime is 1613867. The reversal of 1613844 is 4483161.

1613844 is a `hidden beast` number, since 1 + 613 + 8 + 44 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1411344 + 202500 = 1188^2 + 450^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5362 + ... + 5654.

2^1613844 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 1613844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2241162).

1613844 is an abundant number, since it is smaller than the sum of its proper divisors (2868480).

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

1613844 is a wasteful number, since it uses less digits than its factorization.

1613844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326 (or 315 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 1613844 is about 1270.3715991788. The cubic root of 1613844 is about 117.2970754303.

It can be divided in two parts, 161 and 3844, that added together give a triangular number (4005 = T₈₉).

The spelling of 1613844 in words is "one million, six hundred thirteen thousand, eight hundred forty-four".