1279849896 has 256 divisors, whose sum is σ = 4116268800. Its totient is φ = 369515520.

The previous prime is 1279849873. The next prime is 1279849939. The reversal of 1279849896 is 6989489721.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3866451 + ... + 3866781.

It is an arithmetic number, because the mean of its divisors is an integer number (16079175).

Almost surely, 2^1279849896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1279849896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2058134400).

1279849896 is an abundant number, since it is smaller than the sum of its proper divisors (2836418904).

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

1279849896 is a wasteful number, since it uses less digits than its factorization.

1279849896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388 (or 366 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 63.

The square root of 1279849896 is about 35774.9898113193. The cubic root of 1279849896 is about 1085.7246027974.

The spelling of 1279849896 in words is "one billion, two hundred seventy-nine million, eight hundred forty-nine thousand, eight hundred ninety-six".