1277668080 has 400 divisors, whose sum is σ = 4953120480. Its totient is φ = 303077376.

The previous prime is 1277668057. The next prime is 1277668081. The reversal of 1277668080 is 808667721.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1277668081) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2442699 + ... + 2443221.

Almost surely, 2^1277668080 is an apocalyptic number.

1277668080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1277668080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2476560240).

1277668080 is an abundant number, since it is smaller than the sum of its proper divisors (3675452400).

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

1277668080 is a wasteful number, since it uses less digits than its factorization.

1277668080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590 (or 575 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 1277668080 is about 35744.4832106998. The cubic root of 1277668080 is about 1085.1072911661.

The spelling of 1277668080 in words is "one billion, two hundred seventy-seven million, six hundred sixty-eight thousand, eighty".