1306628556 has 48 divisors (see below), whose sum is σ = 3212563200. Its totient is φ = 412195392.

The previous prime is 1306628539. The next prime is 1306628567. The reversal of 1306628556 is 6558266031.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 277881 + ... + 282543.

It is an arithmetic number, because the mean of its divisors is an integer number (66928400).

Almost surely, 2^1306628556 is an apocalyptic number.

It is an amenable number.

1306628556 is an abundant number, since it is smaller than the sum of its proper divisors (1905934644).

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

1306628556 is a wasteful number, since it uses less digits than its factorization.

1306628556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5918 (or 5916 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The square root of 1306628556 is about 36147.3174108398. The cubic root of 1306628556 is about 1093.2447030160.

The spelling of 1306628556 in words is "one billion, three hundred six million, six hundred twenty-eight thousand, five hundred fifty-six".