6420980 has 24 divisors (see below), whose sum is σ = 13850088. Its totient is φ = 2498688.

The previous prime is 6420971. The next prime is 6420989. The reversal of 6420980 is 890246.

6420980 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (6420971) and next prime (6420989).

It can be written as a sum of positive squares in 4 ways, for example, as 1094116 + 5326864 = 1046^2 + 2308^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6420989) 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, 3599 + ... + 5078.

It is an arithmetic number, because the mean of its divisors is an integer number (577087).

Almost surely, 2^6420980 is an apocalyptic number.

It is an amenable number.

6420980 is an abundant number, since it is smaller than the sum of its proper divisors (7429108).

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

6420980 is a wasteful number, since it uses less digits than its factorization.

6420980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8723 (or 8721 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 6420980 is about 2533.9652720588. The cubic root of 6420980 is about 185.8662081749.

The spelling of 6420980 in words is "six million, four hundred twenty thousand, nine hundred eighty".