747220 has 12 divisors (see below), whose sum is σ = 1569204. Its totient is φ = 298880.

The previous prime is 747203. The next prime is 747223. The reversal of 747220 is 22747.

It can be written as a sum of positive squares in 2 ways, for example, as 394384 + 352836 = 628^2 + 594^2 .

It is a junction number, because it is equal to n+sod(n) for n = 747191 and 747200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (747223) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 18661 + ... + 18700.

It is an arithmetic number, because the mean of its divisors is an integer number (130767).

2⁷⁴⁷²²⁰ is an apocalyptic number.

It is an amenable number.

747220 is an abundant number, since it is smaller than the sum of its proper divisors (821984).

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

747220 is a wasteful number, since it uses less digits than its factorization.

747220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37370 (or 37368 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 22.

The square root of 747220 is about 864.4188799419. The cubic root of 747220 is about 90.7436329825.

Adding to 747220 its reverse (22747), we get a palindrome (769967).

The spelling of 747220 in words is "seven hundred forty-seven thousand, two hundred twenty", and thus it is an iban number.