220404012 has 12 divisors (see below), whose sum is σ = 514276056. Its totient is φ = 73468000.

The previous prime is 220404011. The next prime is 220404013. The reversal of 220404012 is 210404022.

It is an interprime number because it is at equal distance from previous prime (220404011) and next prime (220404013).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×220404012² = 97155857011392288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 220403982 and 220404000.

It is not an unprimeable number, because it can be changed into a prime (220404011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9183489 + ... + 9183512.

It is an arithmetic number, because the mean of its divisors is an integer number (42856338).

Almost surely, 2^220404012 is an apocalyptic number.

It is an amenable number.

220404012 is an abundant number, since it is smaller than the sum of its proper divisors (293872044).

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

220404012 is a wasteful number, since it uses less digits than its factorization.

220404012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18367008 (or 18367006 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 220404012 is about 14846.0099690119. The cubic root of 220404012 is about 604.0503846687.

Adding to 220404012 its reverse (210404022), we get a palindrome (430808034).

The spelling of 220404012 in words is "two hundred twenty million, four hundred four thousand, twelve".