1276338990 has 32 divisors (see below), whose sum is σ = 3113434656. Its totient is φ = 334776960.

The previous prime is 1276338967. The next prime is 1276339007. The reversal of 1276338990 is 998336721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 346897 + ... + 350556.

It is an arithmetic number, because the mean of its divisors is an integer number (97294833).

Almost surely, 2^1276338990 is an apocalyptic number.

1276338990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1276338990 is an abundant number, since it is smaller than the sum of its proper divisors (1837095666).

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

1276338990 is a wasteful number, since it uses less digits than its factorization.

1276338990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697524.

The product of its (nonzero) digits is 489888, while the sum is 48.

The square root of 1276338990 is about 35725.8868329395. The cubic root of 1276338990 is about 1084.7309008645.

The spelling of 1276338990 in words is "one billion, two hundred seventy-six million, three hundred thirty-eight thousand, nine hundred ninety".