1641618 has 24 divisors (see below), whose sum is σ = 3880656. Its totient is φ = 497400.

The previous prime is 1641617. The next prime is 1641623. The reversal of 1641618 is 8161461.

1641618 is a `hidden beast` number, since 1 + 6 + 41 + 618 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1641591 and 1641600.

It is not an unprimeable number, because it can be changed into a prime (1641613) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3948 + ... + 4343.

It is an arithmetic number, because the mean of its divisors is an integer number (161694).

2^1641618 is an apocalyptic number.

1641618 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1641618 is an abundant number, since it is smaller than the sum of its proper divisors (2239038).

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

1641618 is a wasteful number, since it uses less digits than its factorization.

1641618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8310 (or 8307 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 1641618 is about 1281.2564146181. The cubic root of 1641618 is about 117.9661398586.

The spelling of 1641618 in words is "one million, six hundred forty-one thousand, six hundred eighteen".