4020836 has 6 divisors (see below), whose sum is σ = 7036470. Its totient is φ = 2010416.

The previous prime is 4020833. The next prime is 4020847. The reversal of 4020836 is 6380204.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3724900 + 295936 = 1930^2 + 544^2 .

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 as a sum of consecutive naturals, namely, 502601 + ... + 502608.

It is an arithmetic number, because the mean of its divisors is an integer number (1172745).

Almost surely, 2^4020836 is an apocalyptic number.

It is an amenable number.

4020836 is a deficient number, since it is larger than the sum of its proper divisors (3015634).

4020836 is a wasteful number, since it uses less digits than its factorization.

4020836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005213 (or 1005211 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 4020836 is about 2005.2022341899. The cubic root of 4020836 is about 159.0152537348.

The spelling of 4020836 in words is "four million, twenty thousand, eight hundred thirty-six".