1279980830 has 32 divisors (see below), whose sum is σ = 2523623040. Its totient is φ = 465256960.

The previous prime is 1279980781. The next prime is 1279980833. The reversal of 1279980830 is 380899721.

It is a super-3 number, since 3×1279980830³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1279980833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124886 + ... + 134745.

It is an arithmetic number, because the mean of its divisors is an integer number (78863220).

Almost surely, 2^1279980830 is an apocalyptic number.

1279980830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1279980830 is a deficient number, since it is larger than the sum of its proper divisors (1243642210).

1279980830 is a wasteful number, since it uses less digits than its factorization.

1279980830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259684.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 1279980830 is about 35776.8197300990. The cubic root of 1279980830 is about 1085.7616262582.

The spelling of 1279980830 in words is "one billion, two hundred seventy-nine million, nine hundred eighty thousand, eight hundred thirty".