1646464 has 32 divisors (see below), whose sum is σ = 3457800. Its totient is φ = 778752.

The previous prime is 1646461. The next prime is 1646473. The reversal of 1646464 is 4646461.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1646461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2094 + ... + 2770.

2^1646464 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 1646464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1728900).

1646464 is an abundant number, since it is smaller than the sum of its proper divisors (1811336).

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

1646464 is an equidigital number, since it uses as much as digits as its factorization.

1646464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710 (or 698 counting only the distinct ones).

The product of its digits is 13824, while the sum is 31.

The square root of 1646464 is about 1283.1461335327. The cubic root of 1646464 is about 118.0821031590.

The spelling of 1646464 in words is "one million, six hundred forty-six thousand, four hundred sixty-four".