1620032 has 28 divisors (see below), whose sum is σ = 3406140. Its totient is φ = 761856.

The previous prime is 1620019. The next prime is 1620041. The reversal of 1620032 is 2300261.

1620032 is nontrivially palindromic in base 15.

It can be written as a sum of positive squares in 2 ways, for example, as 802816 + 817216 = 896^2 + 904^2 .

It is a zygodrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 1619989 and 1620016.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344 + ... + 1832.

2^1620032 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 1620032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1703070).

1620032 is an abundant number, since it is smaller than the sum of its proper divisors (1786108).

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

1620032 is a wasteful number, since it uses less digits than its factorization.

1620032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1518 (or 1508 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1620032 is about 1272.8047768609. The cubic root of 1620032 is about 117.4468025372.

Adding to 1620032 its reverse (2300261), we get a palindrome (3920293).

It can be divided in two parts, 16200 and 32, that multiplied together give a square (518400 = 720²).

The spelling of 1620032 in words is "one million, six hundred twenty thousand, thirty-two".