6420380 has 24 divisors (see below), whose sum is σ = 13713840. Its totient is φ = 2524160.

The previous prime is 6420377. The next prime is 6420383. The reversal of 6420380 is 830246.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6420377) and next prime (6420383).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6420383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1541 + ... + 3900.

It is an arithmetic number, because the mean of its divisors is an integer number (571410).

Almost surely, 2^6420380 is an apocalyptic number.

It is an amenable number.

6420380 is an abundant number, since it is smaller than the sum of its proper divisors (7293460).

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

6420380 is a wasteful number, since it uses less digits than its factorization.

6420380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5509 (or 5507 counting only the distinct ones).

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

The square root of 6420380 is about 2533.8468777730. The cubic root of 6420380 is about 185.8604186537.

The spelling of 6420380 in words is "six million, four hundred twenty thousand, three hundred eighty".