1816434 has 12 divisors (see below), whose sum is σ = 3935646. Its totient is φ = 605472.

The previous prime is 1816429. The next prime is 1816439. The reversal of 1816434 is 4346181.

1816434 is a `hidden beast` number, since 18 + 1 + 643 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (1816429) and next prime (1816439).

It can be written as a sum of positive squares in only one way, i.e., 1814409 + 2025 = 1347^2 + 45^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1816398 and 1816407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1816439) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50439 + ... + 50474.

2^1816434 is an apocalyptic number.

1816434 is an abundant number, since it is smaller than the sum of its proper divisors (2119212).

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

1816434 is a wasteful number, since it uses less digits than its factorization.

1816434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100921 (or 100918 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 1816434 is about 1347.7514607672. The cubic root of 1816434 is about 122.0131223008.

The spelling of 1816434 in words is "one million, eight hundred sixteen thousand, four hundred thirty-four".