1277268480 has 320 divisors, whose sum is σ = 4808263680. Its totient is φ = 320274432.

The previous prime is 1277268467. The next prime is 1277268533. The reversal of 1277268480 is 848627721.

It is a tau number, because it is divible by the number of its divisors (320).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1174497 + ... + 1175583.

It is an arithmetic number, because the mean of its divisors is an integer number (15025824).

Almost surely, 2^1277268480 is an apocalyptic number.

1277268480 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 1277268480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2404131840).

1277268480 is an abundant number, since it is smaller than the sum of its proper divisors (3530995200).

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

1277268480 is a wasteful number, since it uses less digits than its factorization.

1277268480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136 (or 1114 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 45.

The square root of 1277268480 is about 35738.8930998149. The cubic root of 1277268480 is about 1084.9941543004.

The spelling of 1277268480 in words is "one billion, two hundred seventy-seven million, two hundred sixty-eight thousand, four hundred eighty".