6420036 has 48 divisors (see below), whose sum is σ = 17869824. Its totient is φ = 1754016.

The previous prime is 6420031. The next prime is 6420041. The reversal of 6420036 is 6300246.

It is an interprime number because it is at equal distance from previous prime (6420031) and next prime (6420041).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 6419994 and 6420021.

It is not an unprimeable number, because it can be changed into a prime (6420031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 271 + ... + 3593.

It is an arithmetic number, because the mean of its divisors is an integer number (372288).

Almost surely, 2^6420036 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 6420036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8934912).

6420036 is an abundant number, since it is smaller than the sum of its proper divisors (11449788).

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

6420036 is a wasteful number, since it uses less digits than its factorization.

6420036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3360 (or 3358 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 6420036 is about 2533.7789958874. The cubic root of 6420036 is about 185.8570991656.

It can be divided in two parts, 64 and 20036, that added together give a triangular number (20100 = T₂₀₀).

The spelling of 6420036 in words is "six million, four hundred twenty thousand, thirty-six".