1818432 has 168 divisors, whose sum is σ = 6656832. Its totient is φ = 460800.

The previous prime is 1818431. The next prime is 1818437. The reversal of 1818432 is 2348181.

It is a tau number, because it is divible by the number of its divisors (168).

It is a nude number because it is divisible by every one of its digits.

Its product of digits (1536) is a multiple of the sum of its prime divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 1818396 and 1818405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44332 + ... + 44372.

It is an arithmetic number, because the mean of its divisors is an integer number (39624).

2^1818432 is an apocalyptic number.

1818432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1818432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3328416).

1818432 is an abundant number, since it is smaller than the sum of its proper divisors (4838400).

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

1818432 is a wasteful number, since it uses less digits than its factorization.

1818432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77 (or 64 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 1818432 is about 1348.4924916365. The cubic root of 1818432 is about 122.0578423199.

It can be divided in two parts, 18 and 18432, that multiplied together give a 4-th power (331776 = 24⁴).

The spelling of 1818432 in words is "one million, eight hundred eighteen thousand, four hundred thirty-two".