220485456 has 40 divisors (see below), whose sum is σ = 632876160. Its totient is φ = 73495008.

The previous prime is 220485451. The next prime is 220485493. The reversal of 220485456 is 654584022.

It is a happy number.

It is a super-2 number, since 2×220485456² = 97227672615055872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 220485456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220485451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254760 + ... + 255623.

It is an arithmetic number, because the mean of its divisors is an integer number (15821904).

Almost surely, 2^220485456 is an apocalyptic number.

It is an amenable number.

220485456 is an abundant number, since it is smaller than the sum of its proper divisors (412390704).

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

220485456 is a wasteful number, since it uses less digits than its factorization.

220485456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510400 (or 510388 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

The square root of 220485456 is about 14848.7526748882. The cubic root of 220485456 is about 604.1247786882.

The spelling of 220485456 in words is "two hundred twenty million, four hundred eighty-five thousand, four hundred fifty-six".