1220444433 has 24 divisors (see below), whose sum is σ = 2010147048. Its totient is φ = 706862592.

The previous prime is 1220444429. The next prime is 1220444443. The reversal of 1220444433 is 3344440221.

It is a happy number.

1220444433 is a `hidden beast` number, since 1 + 220 + 4 + 4 + 4 + 433 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 191767104 + 1028677329 = 13848^2 + 32073^2 .

It is not a de Polignac number, because 1220444433 - 2² = 1220444429 is a prime.

It is a super-2 number, since 2×1220444433² = 2978969228081382978, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1220444397 and 1220444406.

It is not an unprimeable number, because it can be changed into a prime (1220444413) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 304810 + ... + 308787.

It is an arithmetic number, because the mean of its divisors is an integer number (83756127).

Almost surely, 2^1220444433 is an apocalyptic number.

1220444433 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1220444433 is a deficient number, since it is larger than the sum of its proper divisors (789702615).

1220444433 is a wasteful number, since it uses less digits than its factorization.

1220444433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613633 (or 613630 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

The square root of 1220444433 is about 34934.8598537335. The cubic root of 1220444433 is about 1068.6594657280.

Adding to 1220444433 its reverse (3344440221), we get a palindrome (4564884654).

The spelling of 1220444433 in words is "one billion, two hundred twenty million, four hundred forty-four thousand, four hundred thirty-three".