4020834 has 8 divisors (see below), whose sum is σ = 8041680. Its totient is φ = 1340276.

The previous prime is 4020833. The next prime is 4020847. The reversal of 4020834 is 4380204.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

4020834 is an admirable number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 4020834.

It is not an unprimeable number, because it can be changed into a prime (4020833) 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, 335064 + ... + 335075.

It is an arithmetic number, because the mean of its divisors is an integer number (1005210).

Almost surely, 2^4020834 is an apocalyptic number.

4020834 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

4020834 is a wasteful number, since it uses less digits than its factorization.

4020834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670144.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 4020834 is about 2005.2017354870. The cubic root of 4020834 is about 159.0152273696.

The spelling of 4020834 in words is "four million, twenty thousand, eight hundred thirty-four".