220040000 has 70 divisors (see below), whose sum is σ = 545726874. Its totient is φ = 88000000.

The previous prime is 220039979. The next prime is 220040021. The reversal of 220040000 is 40022.

It is an interprime number because it is at equal distance from previous prime (220039979) and next prime (220040021).

It can be written as a sum of positive squares in 5 ways, for example, as 26050816 + 193989184 = 5104^2 + 13928^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 220040000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 37250 + ... + 42750.

Almost surely, 2^220040000 is an apocalyptic number.

220040000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220040000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272863437).

220040000 is an abundant number, since it is smaller than the sum of its proper divisors (325686874).

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

220040000 is an frugal number, since it uses more digits than its factorization.

220040000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5533 (or 5508 counting only the distinct ones).

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

The square root of 220040000 is about 14833.7453126309. The cubic root of 220040000 is about 603.7176581944.

Adding to 220040000 its reverse (40022), we get a palindrome (220080022).

The spelling of 220040000 in words is "two hundred twenty million, forty thousand".