1220550430 has 64 divisors (see below), whose sum is σ = 2508185088. Its totient is φ = 423308160.

The previous prime is 1220550427. The next prime is 1220550431. The reversal of 1220550430 is 340550221.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220550431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1550497 + ... + 1551283.

It is an arithmetic number, because the mean of its divisors is an integer number (39190392).

Almost surely, 2^1220550430 is an apocalyptic number.

1220550430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220550430 is an abundant number, since it is smaller than the sum of its proper divisors (1287634658).

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

1220550430 is a wasteful number, since it uses less digits than its factorization.

1220550430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1441.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 1220550430 is about 34936.3768871358. The cubic root of 1220550430 is about 1068.6904029328.

The spelling of 1220550430 in words is "one billion, two hundred twenty million, five hundred fifty thousand, four hundred thirty".