1618636 has 12 divisors (see below), whose sum is σ = 2855160. Its totient is φ = 802880.

The previous prime is 1618627. The next prime is 1618637. The reversal of 1618636 is 6368161.

It is a junction number, because it is equal to n+sod(n) for n = 1618598 and 1618607.

It is not an unprimeable number, because it can be changed into a prime (1618637) 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, 1021 + ... + 2068.

It is an arithmetic number, because the mean of its divisors is an integer number (237930).

2^1618636 is an apocalyptic number.

It is an amenable number.

1618636 is a deficient number, since it is larger than the sum of its proper divisors (1236524).

1618636 is a wasteful number, since it uses less digits than its factorization.

1618636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3224 (or 3222 counting only the distinct ones).

The product of its digits is 5184, while the sum is 31.

The square root of 1618636 is about 1272.2562634941. The cubic root of 1618636 is about 117.4130577607.

The spelling of 1618636 in words is "one million, six hundred eighteen thousand, six hundred thirty-six".