1276538670 has 256 divisors, whose sum is σ = 3982556160. Its totient is φ = 287539200.

The previous prime is 1276538639. The next prime is 1276538699. The reversal of 1276538670 is 768356721.

1276538670 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 6614094 + ... + 6614286.

It is an arithmetic number, because the mean of its divisors is an integer number (15556860).

Almost surely, 2^1276538670 is an apocalyptic number.

1276538670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1276538670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1991278080).

1276538670 is an abundant number, since it is smaller than the sum of its proper divisors (2706017490).

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

1276538670 is a wasteful number, since it uses less digits than its factorization.

1276538670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368 (or 362 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The square root of 1276538670 is about 35728.6813358680. The cubic root of 1276538670 is about 1084.7874657149.

The spelling of 1276538670 in words is "one billion, two hundred seventy-six million, five hundred thirty-eight thousand, six hundred seventy".