1613320 has 32 divisors (see below), whose sum is σ = 3703320. Its totient is φ = 632320.

The previous prime is 1613279. The next prime is 1613321. The reversal of 1613320 is 233161.

It can be written as a sum of positive squares in 4 ways, for example, as 917764 + 695556 = 958^2 + 834^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1613294 and 1613303.

It is not an unprimeable number, because it can be changed into a prime (1613321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1740 + ... + 2500.

2^1613320 is an apocalyptic number.

1613320 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 1613320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1851660).

1613320 is an abundant number, since it is smaller than the sum of its proper divisors (2090000).

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

1613320 is a wasteful number, since it uses less digits than its factorization.

1613320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825 (or 821 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1613320 is about 1270.1653435675. The cubic root of 1613320 is about 117.2843789695.

Adding to 1613320 its reverse (233161), we get a palindrome (1846481).

It can be divided in two parts, 161 and 3320, that added together give a square (3481 = 59²).

The spelling of 1613320 in words is "one million, six hundred thirteen thousand, three hundred twenty".