4020536 has 32 divisors (see below), whose sum is σ = 8253840. Its totient is φ = 1824768.

The previous prime is 4020529. The next prime is 4020563. The reversal of 4020536 is 6350204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6680 + ... + 7256.

Almost surely, 2^4020536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4020536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4126920).

4020536 is an abundant number, since it is smaller than the sum of its proper divisors (4233304).

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

4020536 is a wasteful number, since it uses less digits than its factorization.

4020536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663 (or 659 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 4020536 is about 2005.1274273721. The cubic root of 4020536 is about 159.0112988556.

The spelling of 4020536 in words is "four million, twenty thousand, five hundred thirty-six".