1279478460 has 96 divisors (see below), whose sum is σ = 3877977600. Its totient is φ = 313327872.

The previous prime is 1279478437. The next prime is 1279478461. The reversal of 1279478460 is 648749721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1279478461) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 151099 + ... + 159341.

It is an arithmetic number, because the mean of its divisors is an integer number (40395600).

Almost surely, 2^1279478460 is an apocalyptic number.

1279478460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1279478460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1938988800).

1279478460 is an abundant number, since it is smaller than the sum of its proper divisors (2598499140).

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

1279478460 is a wasteful number, since it uses less digits than its factorization.

1279478460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8467 (or 8465 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 48.

The square root of 1279478460 is about 35769.7981543089. The cubic root of 1279478460 is about 1085.6195602128.

The spelling of 1279478460 in words is "one billion, two hundred seventy-nine million, four hundred seventy-eight thousand, four hundred sixty".