1219804420 has 12 divisors (see below), whose sum is σ = 2561589324. Its totient is φ = 487921760.

The previous prime is 1219804367. The next prime is 1219804423. The reversal of 1219804420 is 244089121.

It can be written as a sum of positive squares in 2 ways, for example, as 194267844 + 1025536576 = 13938^2 + 32024^2 .

It is not an unprimeable number, because it can be changed into a prime (1219804423) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 30495091 + ... + 30495130.

It is an arithmetic number, because the mean of its divisors is an integer number (213465777).

Almost surely, 2^1219804420 is an apocalyptic number.

1219804420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1219804420 is an abundant number, since it is smaller than the sum of its proper divisors (1341784904).

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

1219804420 is a wasteful number, since it uses less digits than its factorization.

1219804420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60990230 (or 60990228 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 1219804420 is about 34925.6985613745. The cubic root of 1219804420 is about 1068.4726279049.

The spelling of 1219804420 in words is "one billion, two hundred nineteen million, eight hundred four thousand, four hundred twenty".