1955664 has 60 divisors (see below), whose sum is σ = 5687136. Its totient is φ = 650592.

The previous prime is 1955641. The next prime is 1955671. The reversal of 1955664 is 4665591.

1955664 is a `hidden beast` number, since 1 + 95 + 566 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3637 + ... + 4139.

2^1955664 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 1955664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2843568).

1955664 is an abundant number, since it is smaller than the sum of its proper divisors (3731472).

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

1955664 is an equidigital number, since it uses as much as digits as its factorization.

1955664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526 (or 508 counting only the distinct ones).

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

The square root of 1955664 is about 1398.4505711680. The cubic root of 1955664 is about 125.0541418792.

The spelling of 1955664 in words is "one million, nine hundred fifty-five thousand, six hundred sixty-four".