1278693130 has 32 divisors (see below), whose sum is σ = 2704036608. Its totient is φ = 429211200.

The previous prime is 1278693071. The next prime is 1278693137. The reversal of 1278693130 is 313968721.

It is a super-2 number, since 2×1278693130² = 3270112241418393800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1278693137) 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, 445666 + ... + 448525.

It is an arithmetic number, because the mean of its divisors is an integer number (84501144).

Almost surely, 2^1278693130 is an apocalyptic number.

1278693130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1278693130 is an abundant number, since it is smaller than the sum of its proper divisors (1425343478).

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

1278693130 is a wasteful number, since it uses less digits than its factorization.

1278693130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894222.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 1278693130 is about 35758.8189122627. The cubic root of 1278693130 is about 1085.3974009169.

The spelling of 1278693130 in words is "one billion, two hundred seventy-eight million, six hundred ninety-three thousand, one hundred thirty".