1618864 has 40 divisors (see below), whose sum is σ = 3475472. Its totient is φ = 725760.

The previous prime is 1618853. The next prime is 1618891. The reversal of 1618864 is 4688161.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8854 + ... + 9034.

2^1618864 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 1618864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1737736).

1618864 is an abundant number, since it is smaller than the sum of its proper divisors (1856608).

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

1618864 is a wasteful number, since it uses less digits than its factorization.

1618864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245 (or 239 counting only the distinct ones).

The product of its digits is 9216, while the sum is 34.

The square root of 1618864 is about 1272.3458649282. The cubic root of 1618864 is about 117.4185704105.

It can be divided in two parts, 161 and 8864, that added together give a square (9025 = 95²).

The spelling of 1618864 in words is "one million, six hundred eighteen thousand, eight hundred sixty-four".