74220 has 24 divisors (see below), whose sum is σ = 207984. Its totient is φ = 19776.

The previous prime is 74219. The next prime is 74231. The reversal of 74220 is 2247.

74220 = 22² + 23² + ... + 61².

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 74220.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 74220.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 559 + ... + 678.

It is an arithmetic number, because the mean of its divisors is an integer number (8666).

2⁷⁴²²⁰ is an apocalyptic number.

It is an amenable number.

74220 is an abundant number, since it is smaller than the sum of its proper divisors (133764).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103992).

74220 is a wasteful number, since it uses less digits than its factorization.

74220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249 (or 1247 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 15.

The square root of 74220 is about 272.4334781190. The cubic root of 74220 is about 42.0249285118.

Adding to 74220 its reverse (2247), we get a palindrome (76467).

The spelling of 74220 in words is "seventy-four thousand, two hundred twenty", and thus it is an iban number.