2185434 has 16 divisors (see below), whose sum is σ = 4856640. Its totient is φ = 728460.

The previous prime is 2185433. The next prime is 2185439. The reversal of 2185434 is 4345812.

It is a super-2 number, since 2×2185434² = 9552243536712, which contains 22 as substring.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2185398 and 2185407.

It is not an unprimeable number, because it can be changed into a prime (2185433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20182 + ... + 20289.

It is an arithmetic number, because the mean of its divisors is an integer number (303540).

2^2185434 is an apocalyptic number.

2185434 is an abundant number, since it is smaller than the sum of its proper divisors (2671206).

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

2185434 is a wasteful number, since it uses less digits than its factorization.

2185434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40482 (or 40476 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 2185434 is about 1478.3213453103. The cubic root of 2185434 is about 129.7714722725.

The spelling of 2185434 in words is "two million, one hundred eighty-five thousand, four hundred thirty-four".