1641888 has 36 divisors (see below), whose sum is σ = 4669938. Its totient is φ = 547200.

The previous prime is 1641881. The next prime is 1641889. The reversal of 1641888 is 8881461.

1641888 is a `hidden beast` number, since 1 + 641 + 8 + 8 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1140624 + 501264 = 1068^2 + 708^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

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

It is not an unprimeable number, because it can be changed into a prime (1641881) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2563 + ... + 3138.

2^1641888 is an apocalyptic number.

1641888 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1641888 is an abundant number, since it is smaller than the sum of its proper divisors (3028050).

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

1641888 is a wasteful number, since it uses less digits than its factorization.

1641888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5717 (or 5706 counting only the distinct ones).

The product of its digits is 12288, while the sum is 36.

The square root of 1641888 is about 1281.3617756122. The cubic root of 1641888 is about 117.9726068751.

The spelling of 1641888 in words is "one million, six hundred forty-one thousand, eight hundred eighty-eight".