1641648 has 40 divisors (see below), whose sum is σ = 4428288. Its totient is φ = 523072.

The previous prime is 1641641. The next prime is 1641659. The reversal of 1641648 is 8461461.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a nude number because it is divisible by every one of its digits.

It is a zygodrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (1641641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361 + ... + 1847.

2^1641648 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 1641648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2214144).

1641648 is an abundant number, since it is smaller than the sum of its proper divisors (2786640).

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

1641648 is a wasteful number, since it uses less digits than its factorization.

1641648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1521 (or 1515 counting only the distinct ones).

The product of its digits is 4608, while the sum is 30.

The square root of 1641648 is about 1281.2681218231. The cubic root of 1641648 is about 117.9668584510.

The spelling of 1641648 in words is "one million, six hundred forty-one thousand, six hundred forty-eight".