1220615404 has 24 divisors (see below), whose sum is σ = 2253902000. Its totient is φ = 576797760.

The previous prime is 1220615399. The next prime is 1220615411. The reversal of 1220615404 is 4045160221.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 12922 + ... + 51070.

Almost surely, 2^1220615404 is an apocalyptic number.

It is an amenable number.

1220615404 is a deficient number, since it is larger than the sum of its proper divisors (1033286596).

1220615404 is a wasteful number, since it uses less digits than its factorization.

1220615404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38593 (or 38591 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 1220615404 is about 34937.3067651186. The cubic root of 1220615404 is about 1068.7093659232.

Adding to 1220615404 its reverse (4045160221), we get a palindrome (5265775625).

The spelling of 1220615404 in words is "one billion, two hundred twenty million, six hundred fifteen thousand, four hundred four".