747280 has 20 divisors (see below), whose sum is σ = 1737612. Its totient is φ = 298880.

The previous prime is 747277. The next prime is 747283. The reversal of 747280 is 82747.

It is an interprime number because it is at equal distance from previous prime (747277) and next prime (747283).

It can be written as a sum of positive squares in 2 ways, for example, as 246016 + 501264 = 496^2 + 708^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (747283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4591 + ... + 4750.

2⁷⁴⁷²⁸⁰ is an apocalyptic number.

It is an amenable number.

747280 is an abundant number, since it is smaller than the sum of its proper divisors (990332).

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

747280 is a wasteful number, since it uses less digits than its factorization.

747280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9354 (or 9348 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 747280 is about 864.4535846418. The cubic root of 747280 is about 90.7460617506.

The spelling of 747280 in words is "seven hundred forty-seven thousand, two hundred eighty".