1276616394 has 96 divisors (see below), whose sum is σ = 3075770880. Its totient is φ = 380851200.

The previous prime is 1276616387. The next prime is 1276616417. The reversal of 1276616394 is 4936166721.

1276616394 is a `hidden beast` number, since 1 + 2 + 7 + 6 + 6 + 1 + 639 + 4 = 666.

1276616394 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 558534 + ... + 560814.

It is an arithmetic number, because the mean of its divisors is an integer number (32039280).

Almost surely, 2^1276616394 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1276616394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1537885440).

1276616394 is an abundant number, since it is smaller than the sum of its proper divisors (1799154486).

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

1276616394 is a wasteful number, since it uses less digits than its factorization.

1276616394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2396 (or 2393 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 1276616394 is about 35729.7690168856. The cubic root of 1276616394 is about 1084.8094815801.

The spelling of 1276616394 in words is "one billion, two hundred seventy-six million, six hundred sixteen thousand, three hundred ninety-four".