1255665928 has 32 divisors (see below), whose sum is σ = 2573856000. Its totient is φ = 569546560.

The previous prime is 1255665899. The next prime is 1255665967. The reversal of 1255665928 is 8295665521.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27258 + ... + 57046.

It is an arithmetic number, because the mean of its divisors is an integer number (80433000).

Almost surely, 2^1255665928 is an apocalyptic number.

It is an amenable number.

1255665928 is an abundant number, since it is smaller than the sum of its proper divisors (1318190072).

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

1255665928 is a wasteful number, since it uses less digits than its factorization.

1255665928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30285 (or 30281 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 49.

The square root of 1255665928 is about 35435.3767864827. The cubic root of 1255665928 is about 1078.8424749631.

The spelling of 1255665928 in words is "one billion, two hundred fifty-five million, six hundred sixty-five thousand, nine hundred twenty-eight".