6420786 has 8 divisors (see below), whose sum is σ = 12841584. Its totient is φ = 2140260.

The previous prime is 6420769. The next prime is 6420787. The reversal of 6420786 is 6870246.

6420786 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

6420786 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (6420787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 535060 + ... + 535071.

It is an arithmetic number, because the mean of its divisors is an integer number (1605198).

Almost surely, 2^6420786 is an apocalyptic number.

6420786 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

6420786 is a wasteful number, since it uses less digits than its factorization.

6420786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070136.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 6420786 is about 2533.9269918449. The cubic root of 6420786 is about 185.8643362692.

The spelling of 6420786 in words is "six million, four hundred twenty thousand, seven hundred eighty-six".