1220402404 has 36 divisors (see below), whose sum is σ = 2316176100. Its totient is φ = 562398720.

The previous prime is 1220402363. The next prime is 1220402437. The reversal of 1220402404 is 4042040221.

It can be written as a sum of positive squares in 6 ways, for example, as 996004 + 1219406400 = 998^2 + 34920^2 .

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 11 ways as a sum of consecutive naturals, for example, 708264 + ... + 709984.

It is an arithmetic number, because the mean of its divisors is an integer number (64338225).

Almost surely, 2^1220402404 is an apocalyptic number.

It is an amenable number.

1220402404 is a deficient number, since it is larger than the sum of its proper divisors (1095773696).

1220402404 is a wasteful number, since it uses less digits than its factorization.

1220402404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2800 (or 2785 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 1220402404 is about 34934.2583147260. The cubic root of 1220402404 is about 1068.6471982831.

Adding to 1220402404 its reverse (4042040221), we get a palindrome (5262442625).

The spelling of 1220402404 in words is "one billion, two hundred twenty million, four hundred two thousand, four hundred four".