1277680980 has 48 divisors (see below), whose sum is σ = 3586584960. Its totient is φ = 339850368.

The previous prime is 1277680979. The next prime is 1277681071. The reversal of 1277680980 is 890867721.

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, 3000 + ... + 50639.

It is an arithmetic number, because the mean of its divisors is an integer number (74720520).

Almost surely, 2^1277680980 is an apocalyptic number.

1277680980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1277680980 is an abundant number, since it is smaller than the sum of its proper divisors (2308903980).

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

1277680980 is a wasteful number, since it uses less digits than its factorization.

1277680980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54048 (or 54046 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 48.

The square root of 1277680980 is about 35744.6636576706. The cubic root of 1277680980 is about 1085.1109430893.

The spelling of 1277680980 in words is "one billion, two hundred seventy-seven million, six hundred eighty thousand, nine hundred eighty".