1220443450 has 24 divisors (see below), whose sum is σ = 2271327840. Its totient is φ = 487897200.

The previous prime is 1220443439. The next prime is 1220443451. The reversal of 1220443450 is 543440221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (1220443451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95965 + ... + 107935.

It is an arithmetic number, because the mean of its divisors is an integer number (94638660).

Almost surely, 2^1220443450 is an apocalyptic number.

1220443450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220443450 is a deficient number, since it is larger than the sum of its proper divisors (1050884390).

1220443450 is a wasteful number, since it uses less digits than its factorization.

1220443450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14022 (or 14017 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 1220443450 is about 34934.8457846890. The cubic root of 1220443450 is about 1068.6591788127.

Adding to 1220443450 its reverse (543440221), we get a palindrome (1763883671).

The spelling of 1220443450 in words is "one billion, two hundred twenty million, four hundred forty-three thousand, four hundred fifty".