1277408448 has 56 divisors (see below), whose sum is σ = 3755349360. Its totient is φ = 425802240.

The previous prime is 1277408417. The next prime is 1277408449. The reversal of 1277408448 is 8448047721.

It is not an unprimeable number, because it can be changed into a prime (1277408449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 367893 + ... + 371348.

It is an arithmetic number, because the mean of its divisors is an integer number (67059810).

Almost surely, 2^1277408448 is an apocalyptic number.

1277408448 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1277408448 is an abundant number, since it is smaller than the sum of its proper divisors (2477940912).

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

1277408448 is an equidigital number, since it uses as much as digits as its factorization.

1277408448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739262 (or 739246 counting only the distinct ones).

The product of its (nonzero) digits is 401408, while the sum is 45.

The square root of 1277408448 is about 35740.8512489560. The cubic root of 1277408448 is about 1085.0337854657.

The spelling of 1277408448 in words is "one billion, two hundred seventy-seven million, four hundred eight thousand, four hundred forty-eight".