1955646 has 96 divisors (see below), whose sum is σ = 5660928. Its totient is φ = 472320.

The previous prime is 1955641. The next prime is 1955671. The reversal of 1955646 is 6465591.

1955646 is a `hidden beast` number, since 1 + 9 + 5 + 5 + 646 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1955646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1955641) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23521 + ... + 23603.

It is an arithmetic number, because the mean of its divisors is an integer number (58968).

2^1955646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1955646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2830464).

1955646 is an abundant number, since it is smaller than the sum of its proper divisors (3705282).

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

1955646 is a wasteful number, since it uses less digits than its factorization.

1955646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126 (or 123 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 1955646 is about 1398.4441354591. Note that the first 3 decimals coincide. The cubic root of 1955646 is about 125.0537582105.

It can be divided in two parts, 1955 and 646, that added together give a square (2601 = 51²).

The spelling of 1955646 in words is "one million, nine hundred fifty-five thousand, six hundred forty-six".