4003280 has 40 divisors (see below), whose sum is σ = 9395232. Its totient is φ = 1586304.

The previous prime is 4003273. The next prime is 4003291. The reversal of 4003280 is 823004.

4003280 = T₄₉ + T₅₀ + ... + T₂₈₈.

4003280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12887 + ... + 13193.

Almost surely, 2^4003280 is an apocalyptic number.

4003280 is a gapful number since it is divisible by the number (40) 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 4003280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4697616).

4003280 is an abundant number, since it is smaller than the sum of its proper divisors (5391952).

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

4003280 is a wasteful number, since it uses less digits than its factorization.

4003280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483 (or 477 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 4003280 is about 2000.8198319689. The cubic root of 4003280 is about 158.7834823047.

Adding to 4003280 its reverse (823004), we get a palindrome (4826284).

The spelling of 4003280 in words is "four million, three thousand, two hundred eighty".