1220543346 has 128 divisors (see below), whose sum is σ = 2950152192. Its totient is φ = 332640000.

The previous prime is 1220543341. The next prime is 1220543351. The reversal of 1220543346 is 6433450221.

It is an interprime number because it is at equal distance from previous prime (1220543341) and next prime (1220543351).

It is not an unprimeable number, because it can be changed into a prime (1220543341) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1740796 + ... + 1741496.

It is an arithmetic number, because the mean of its divisors is an integer number (23048064).

Almost surely, 2^1220543346 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220543346, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1475076096).

1220543346 is an abundant number, since it is smaller than the sum of its proper divisors (1729608846).

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

1220543346 is a wasteful number, since it uses less digits than its factorization.

1220543346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 1220543346 is about 34936.2755026920. The cubic root of 1220543346 is about 1068.6883353909.

Adding to 1220543346 its reverse (6433450221), we get a palindrome (7653993567).

The spelling of 1220543346 in words is "one billion, two hundred twenty million, five hundred forty-three thousand, three hundred forty-six".