1620836 has 24 divisors (see below), whose sum is σ = 3278016. Its totient is φ = 686880.

The previous prime is 1620823. The next prime is 1620841. The reversal of 1620836 is 6380261.

It is a plaindrome in base 13.

It is a zygodrome in base 13.

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 7 ways as a sum of consecutive naturals, for example, 2726 + ... + 3266.

It is an arithmetic number, because the mean of its divisors is an integer number (136584).

2^1620836 is an apocalyptic number.

It is an amenable number.

1620836 is an abundant number, since it is smaller than the sum of its proper divisors (1657180).

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

1620836 is a wasteful number, since it uses less digits than its factorization.

1620836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659 (or 657 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1620836 is about 1273.1205755937. The cubic root of 1620836 is about 117.4662284112.

The spelling of 1620836 in words is "one million, six hundred twenty thousand, eight hundred thirty-six".