6478020 has 144 divisors (see below), whose sum is σ = 21818160. Its totient is φ = 1548288.

The previous prime is 6478013. The next prime is 6478027. The reversal of 6478020 is 208746.

It is an interprime number because it is at equal distance from previous prime (6478013) and next prime (6478027).

It can be written as a sum of positive squares in 8 ways, for example, as 97344 + 6380676 = 312^2 + 2526^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6478027) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 88704 + ... + 88776.

It is an arithmetic number, because the mean of its divisors is an integer number (151515).

Almost surely, 2^6478020 is an apocalyptic number.

6478020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6478020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10909080).

6478020 is an abundant number, since it is smaller than the sum of its proper divisors (15340140).

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

6478020 is a wasteful number, since it uses less digits than its factorization.

6478020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 129 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 6478020 is about 2545.1954738291. The cubic root of 6478020 is about 186.4149597798.

The spelling of 6478020 in words is "six million, four hundred seventy-eight thousand, twenty".