1279376896 has 40 divisors (see below), whose sum is σ = 2921442480. Its totient is φ = 548302848.

The previous prime is 1279376887. The next prime is 1279376899. The reversal of 1279376896 is 6986739721.

It is a self number, because there is not a number n which added to its sum of digits gives 1279376896.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1279376899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174901 + ... + 182068.

It is an arithmetic number, because the mean of its divisors is an integer number (73036062).

Almost surely, 2^1279376896 is an apocalyptic number.

1279376896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1279376896 is an abundant number, since it is smaller than the sum of its proper divisors (1642065584).

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

1279376896 is an frugal number, since it uses more digits than its factorization.

1279376896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356994 (or 356978 counting only the distinct ones).

The product of its digits is 6858432, while the sum is 58.

The square root of 1279376896 is about 35768.3784368260. The cubic root of 1279376896 is about 1085.5908342420.

The spelling of 1279376896 in words is "one billion, two hundred seventy-nine million, three hundred seventy-six thousand, eight hundred ninety-six".