6450280 has 48 divisors (see below), whose sum is σ = 15031620. Its totient is φ = 2490624.

The previous prime is 6450277. The next prime is 6450287. The reversal of 6450280 is 820546.

It can be written as a sum of positive squares in 2 ways, for example, as 6441444 + 8836 = 2538^2 + 94^2 .

It is a super-2 number, since 2×6450280² = 83212224156800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6450287) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88324 + ... + 88396.

Almost surely, 2^6450280 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 6450280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7515810).

6450280 is an abundant number, since it is smaller than the sum of its proper divisors (8581340).

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

6450280 is a wasteful number, since it uses less digits than its factorization.

6450280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 6450280 is about 2539.7401441880. The cubic root of 6450280 is about 186.1484920500.

The spelling of 6450280 in words is "six million, four hundred fifty thousand, two hundred eighty".