1208390780 has 12 divisors (see below), whose sum is σ = 2537620680. Its totient is φ = 483356304.

The previous prime is 1208390779. The next prime is 1208390783. The reversal of 1208390780 is 870938021.

1208390780 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1208390783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30209750 + ... + 30209789.

It is an arithmetic number, because the mean of its divisors is an integer number (211468390).

Almost surely, 2^1208390780 is an apocalyptic number.

1208390780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1208390780 is an abundant number, since it is smaller than the sum of its proper divisors (1329229900).

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

1208390780 is a wasteful number, since it uses less digits than its factorization.

1208390780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60419548 (or 60419546 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 1208390780 is about 34761.9156549233. The cubic root of 1208390780 is about 1065.1296336871.

The spelling of 1208390780 in words is "one billion, two hundred eight million, three hundred ninety thousand, seven hundred eighty".