1618436 has 12 divisors (see below), whose sum is σ = 2842140. Its totient is φ = 806400.

The previous prime is 1618433. The next prime is 1618453. The reversal of 1618436 is 6348161.

It can be written as a sum of positive squares in 2 ways, for example, as 1188100 + 430336 = 1090^2 + 656^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1618399 and 1618408.

It is not an unprimeable number, because it can be changed into a prime (1618433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1100 + ... + 2108.

It is an arithmetic number, because the mean of its divisors is an integer number (236845).

2^1618436 is an apocalyptic number.

It is an amenable number.

1618436 is a deficient number, since it is larger than the sum of its proper divisors (1223704).

1618436 is a wasteful number, since it uses less digits than its factorization.

1618436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1414 (or 1412 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 1618436 is about 1272.1776605490. The cubic root of 1618436 is about 117.4082216767.

The spelling of 1618436 in words is "one million, six hundred eighteen thousand, four hundred thirty-six".