1220518604 has 24 divisors (see below), whose sum is σ = 2299888080. Its totient is φ = 564624896.

The previous prime is 1220518601. The next prime is 1220518619. The reversal of 1220518604 is 4068150221.

It is not an unprimeable number, because it can be changed into a prime (1220518601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148097 + ... + 156120.

It is an arithmetic number, because the mean of its divisors is an integer number (95828670).

Almost surely, 2^1220518604 is an apocalyptic number.

It is an amenable number.

1220518604 is a deficient number, since it is larger than the sum of its proper divisors (1079369476).

1220518604 is a wasteful number, since it uses less digits than its factorization.

1220518604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304297 (or 304295 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 1220518604 is about 34935.9213990414. The cubic root of 1220518604 is about 1068.6811141082.

Adding to 1220518604 its reverse (4068150221), we get a palindrome (5288668825).

The spelling of 1220518604 in words is "one billion, two hundred twenty million, five hundred eighteen thousand, six hundred four".