1220491004 has 12 divisors (see below), whose sum is σ = 2142314328. Its totient is φ = 608401200.

The previous prime is 1220491003. The next prime is 1220491007. The reversal of 1220491004 is 4001940221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220491003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 459587 + ... + 462234.

It is an arithmetic number, because the mean of its divisors is an integer number (178526194).

Almost surely, 2^1220491004 is an apocalyptic number.

It is an amenable number.

1220491004 is a deficient number, since it is larger than the sum of its proper divisors (921823324).

1220491004 is a wasteful number, since it uses less digits than its factorization.

1220491004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922156 (or 922154 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 1220491004 is about 34935.5263879049. The cubic root of 1220491004 is about 1068.6730585650.

The spelling of 1220491004 in words is "one billion, two hundred twenty million, four hundred ninety-one thousand, four".