4004280 has 144 divisors (see below), whose sum is σ = 15205320. Its totient is φ = 911232.

The previous prime is 4004279. The next prime is 4004281. The reversal of 4004280 is 824004.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (4004279) and next prime (4004281).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4004281) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 17527 + ... + 17753.

Almost surely, 2^4004280 is an apocalyptic number.

4004280 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 4004280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7602660).

4004280 is an abundant number, since it is smaller than the sum of its proper divisors (11201040).

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

4004280 is a wasteful number, since it uses less digits than its factorization.

4004280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258 (or 244 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 4004280 is about 2001.0697139280. The cubic root of 4004280 is about 158.7967023195.

Adding to 4004280 its reverse (824004), we get a palindrome (4828284).

The spelling of 4004280 in words is "four million, four thousand, two hundred eighty".