4021838 has 8 divisors (see below), whose sum is σ = 6042360. Its totient is φ = 2007720.

The previous prime is 4021777. The next prime is 4021867. The reversal of 4021838 is 8381204.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 548 + ... + 2888.

It is an arithmetic number, because the mean of its divisors is an integer number (755295).

Almost surely, 2^4021838 is an apocalyptic number.

4021838 is a deficient number, since it is larger than the sum of its proper divisors (2020522).

4021838 is a wasteful number, since it uses less digits than its factorization.

4021838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3202.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 4021838 is about 2005.4520687366. The cubic root of 4021838 is about 159.0284616059.

The spelling of 4021838 in words is "four million, twenty-one thousand, eight hundred thirty-eight".