1204161620 has 48 divisors (see below), whose sum is σ = 2587334400. Its totient is φ = 470542464.

The previous prime is 1204161617. The next prime is 1204161631. The reversal of 1204161620 is 261614021.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 776606 + ... + 778154.

It is an arithmetic number, because the mean of its divisors is an integer number (53902800).

Almost surely, 2^1204161620 is an apocalyptic number.

1204161620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1204161620 is an abundant number, since it is smaller than the sum of its proper divisors (1383172780).

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

1204161620 is a wasteful number, since it uses less digits than its factorization.

1204161620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2432 (or 2430 counting only the distinct ones).

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

The square root of 1204161620 is about 34701.0319731273. The cubic root of 1204161620 is about 1063.8855910394.

Adding to 1204161620 its reverse (261614021), we get a palindrome (1465775641).

The spelling of 1204161620 in words is "one billion, two hundred four million, one hundred sixty-one thousand, six hundred twenty".