4391280 has 160 divisors (see below), whose sum is σ = 16070400. Its totient is φ = 1099008.

The previous prime is 4391263. The next prime is 4391323. The reversal of 4391280 is 821934.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40987 + ... + 41093.

It is an arithmetic number, because the mean of its divisors is an integer number (100440).

Almost surely, 2^4391280 is an apocalyptic number.

4391280 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 4391280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8035200).

4391280 is an abundant number, since it is smaller than the sum of its proper divisors (11679120).

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

4391280 is a wasteful number, since it uses less digits than its factorization.

4391280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 4391280 is about 2095.5381170477. The cubic root of 4391280 is about 163.7559328115.

The spelling of 4391280 in words is "four million, three hundred ninety-one thousand, two hundred eighty".