1279947028 has 24 divisors (see below), whose sum is σ = 2273372640. Its totient is φ = 630483360.

The previous prime is 1279947013. The next prime is 1279947037. The reversal of 1279947028 is 8207499721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64050 + ... + 81622.

It is an arithmetic number, because the mean of its divisors is an integer number (94723860).

Almost surely, 2^1279947028 is an apocalyptic number.

It is an amenable number.

1279947028 is a deficient number, since it is larger than the sum of its proper divisors (993425612).

1279947028 is a wasteful number, since it uses less digits than its factorization.

1279947028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17847 (or 17845 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 49.

The square root of 1279947028 is about 35776.3473261315. The cubic root of 1279947028 is about 1085.7520685011.

The spelling of 1279947028 in words is "one billion, two hundred seventy-nine million, nine hundred forty-seven thousand, twenty-eight".