220040 has 16 divisors (see below), whose sum is σ = 495180. Its totient is φ = 88000.

The previous prime is 220021. The next prime is 220057. The reversal of 220040 is 40022.

220040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 206116 + 13924 = 454^2 + 118^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2711 + ... + 2790.

2²²⁰⁰⁴⁰ is an apocalyptic number.

220040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220040 is an abundant number, since it is smaller than the sum of its proper divisors (275140).

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

220040 is a wasteful number, since it uses less digits than its factorization.

220040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5512 (or 5508 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 8.

The square root of 220040 is about 469.0842141876. The cubic root of 220040 is about 60.3717658194.

Adding to 220040 its reverse (40022), we get a palindrome (260062).

The spelling of 220040 in words is "two hundred twenty thousand, forty", and thus it is an iban number.