1618432 has 40 divisors (see below), whose sum is σ = 3375900. Its totient is φ = 774144.

The previous prime is 1618411. The next prime is 1618433. The reversal of 1618432 is 2348161.

It can be written as a sum of positive squares in 2 ways, for example, as 1597696 + 20736 = 1264^2 + 144^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1618397 and 1618406.

It is not an unprimeable number, because it can be changed into a prime (1618433) 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, 14794 + ... + 14902.

2^1618432 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 1618432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1687950).

1618432 is an abundant number, since it is smaller than the sum of its proper divisors (1757468).

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

1618432 is an equidigital number, since it uses as much as digits as its factorization.

1618432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156 (or 140 counting only the distinct ones).

The product of its digits is 1152, while the sum is 25.

The square root of 1618432 is about 1272.1760884406. The cubic root of 1618432 is about 117.4081249510.

The spelling of 1618432 in words is "one million, six hundred eighteen thousand, four hundred thirty-two".