4020736 has 20 divisors (see below), whose sum is σ = 8034642. Its totient is φ = 2010112.

The previous prime is 4020733. The next prime is 4020749. The reversal of 4020736 is 6370204.

It can be written as a sum of positive squares in only one way, i.e., 4000000 + 20736 = 2000^2 + 144^2 .

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (4020733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3415 + ... + 4438.

Almost surely, 2^4020736 is an apocalyptic number.

It is an amenable number.

4020736 is a deficient number, since it is larger than the sum of its proper divisors (4013906).

4020736 is an frugal number, since it uses more digits than its factorization.

4020736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7871 (or 7855 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 4020736 is about 2005.1772988940. The cubic root of 4020736 is about 159.0139354636.

The spelling of 4020736 in words is "four million, twenty thousand, seven hundred thirty-six".