1220402346 has 8 divisors (see below), whose sum is σ = 2440804704. Its totient is φ = 406800780.

The previous prime is 1220402263. The next prime is 1220402363. The reversal of 1220402346 is 6432040221.

It is a sphenic number, since it is the product of 3 distinct primes.

1220402346 is an admirable number.

It is a super-2 number, since 2×1220402346² = 2978763772244607432, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101700190 + ... + 101700201.

It is an arithmetic number, because the mean of its divisors is an integer number (305100588).

Almost surely, 2^1220402346 is an apocalyptic number.

1220402346 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1220402346 is a wasteful number, since it uses less digits than its factorization.

1220402346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203400396.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 1220402346 is about 34934.2574845953. The cubic root of 1220402346 is about 1068.6471813539.

Adding to 1220402346 its reverse (6432040221), we get a palindrome (7652442567).

The spelling of 1220402346 in words is "one billion, two hundred twenty million, four hundred two thousand, three hundred forty-six".