1208440820 has 12 divisors (see below), whose sum is σ = 2537725764. Its totient is φ = 483376320.

The previous prime is 1208440813. The next prime is 1208440837. The reversal of 1208440820 is 280448021.

It can be written as a sum of positive squares in 2 ways, for example, as 191213584 + 1017227236 = 13828^2 + 31894^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30211001 + ... + 30211040.

It is an arithmetic number, because the mean of its divisors is an integer number (211477147).

Almost surely, 2^1208440820 is an apocalyptic number.

1208440820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1208440820 is an abundant number, since it is smaller than the sum of its proper divisors (1329284944).

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

1208440820 is a wasteful number, since it uses less digits than its factorization.

1208440820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60422050 (or 60422048 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 29.

The square root of 1208440820 is about 34762.6354006712. The cubic root of 1208440820 is about 1065.1443359815.

Adding to 1208440820 its reverse (280448021), we get a palindrome (1488888841).

The spelling of 1208440820 in words is "one billion, two hundred eight million, four hundred forty thousand, eight hundred twenty".