1276327920 has 80 divisors (see below), whose sum is σ = 4521853440. Its totient is φ = 291731712.

The previous prime is 1276327873. The next prime is 1276327931. The reversal of 1276327920 is 297236721.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent 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, 378180 + ... + 381539.

It is an arithmetic number, because the mean of its divisors is an integer number (56523168).

Almost surely, 2^1276327920 is an apocalyptic number.

1276327920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1276327920 is an abundant number, since it is smaller than the sum of its proper divisors (3245525520).

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

1276327920 is a wasteful number, since it uses less digits than its factorization.

1276327920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759742 (or 759736 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 1276327920 is about 35725.7319029296. The cubic root of 1276327920 is about 1084.7277648101.

The spelling of 1276327920 in words is "one billion, two hundred seventy-six million, three hundred twenty-seven thousand, nine hundred twenty".