1279238028 has 24 divisors (see below), whose sum is σ = 2987640432. Its totient is φ = 426019584.

The previous prime is 1279238021. The next prime is 1279238039. The reversal of 1279238028 is 8208329721.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1279238021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35425 + ... + 61752.

It is an arithmetic number, because the mean of its divisors is an integer number (124485018).

Almost surely, 2^1279238028 is an apocalyptic number.

It is an amenable number.

1279238028 is an abundant number, since it is smaller than the sum of its proper divisors (1708402404).

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

1279238028 is a wasteful number, since it uses less digits than its factorization.

1279238028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98281 (or 98279 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 1279238028 is about 35766.4371722988. The cubic root of 1279238028 is about 1085.5515548910.

The spelling of 1279238028 in words is "one billion, two hundred seventy-nine million, two hundred thirty-eight thousand, twenty-eight".