4721280 has 64 divisors (see below), whose sum is σ = 15055200. Its totient is φ = 1258496.

The previous prime is 4721263. The next prime is 4721303. The reversal of 4721280 is 821274.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 4721280.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 691 + ... + 3149.

Almost surely, 2^4721280 is an apocalyptic number.

4721280 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 4721280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7527600).

4721280 is an abundant number, since it is smaller than the sum of its proper divisors (10333920).

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

4721280 is a wasteful number, since it uses less digits than its factorization.

4721280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2481 (or 2469 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 4721280 is about 2172.8506621487. The cubic root of 4721280 is about 167.7592924713.

The spelling of 4721280 in words is "four million, seven hundred twenty-one thousand, two hundred eighty".