1620936 has 48 divisors (see below), whose sum is σ = 4492800. Its totient is φ = 527712.

The previous prime is 1620929. The next prime is 1620961. The reversal of 1620936 is 6390261.

It is a happy number.

1620936 is a `hidden beast` number, since 1 + 620 + 9 + 36 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3145 + ... + 3623.

It is an arithmetic number, because the mean of its divisors is an integer number (93600).

2^1620936 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 1620936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2246400).

1620936 is an abundant number, since it is smaller than the sum of its proper divisors (2871864).

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

1620936 is a wasteful number, since it uses less digits than its factorization.

1620936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538 (or 531 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 1620936 is about 1273.1598485658. The cubic root of 1620936 is about 117.4686441154.

It can be divided in two parts, 1620 and 936, that added together give a triangular number (2556 = T₇₁).

The spelling of 1620936 in words is "one million, six hundred twenty thousand, nine hundred thirty-six".