1275338880 has 96 divisors (see below), whose sum is σ = 4403924460. Its totient is φ = 340088832.

The previous prime is 1275338863. The next prime is 1275338917. The reversal of 1275338880 is 888335721.

It can be written as a sum of positive squares in 2 ways, for example, as 1242985536 + 32353344 = 35256^2 + 5688^2 .

It is a tau number, because it is divible by the number of its divisors (96).

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104947 + ... + 116466.

Almost surely, 2^1275338880 is an apocalyptic number.

1275338880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1275338880 is an abundant number, since it is smaller than the sum of its proper divisors (3128585580).

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

1275338880 is a wasteful number, since it uses less digits than its factorization.

1275338880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221438 (or 221423 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 1275338880 is about 35711.8870965957. The cubic root of 1275338880 is about 1084.4475034005.

The spelling of 1275338880 in words is "one billion, two hundred seventy-five million, three hundred thirty-eight thousand, eight hundred eighty".