1278973696 has 432 divisors, whose sum is σ = 3758082048. Its totient is φ = 425779200.

The previous prime is 1278973679. The next prime is 1278973697. The reversal of 1278973696 is 6963798721.

Its product of digits (6858432) is a multiple of the sum of its prime factors (108).

It is a self number, because there is not a number n which added to its sum of digits gives 1278973696.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278973697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 41257201 + ... + 41257231.

It is an arithmetic number, because the mean of its divisors is an integer number (8699264).

Almost surely, 2^1278973696 is an apocalyptic number.

1278973696 is a gapful number since it is divisible by the number (16) 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 1278973696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1879041024).

1278973696 is an abundant number, since it is smaller than the sum of its proper divisors (2479108352).

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

1278973696 is a wasteful number, since it uses less digits than its factorization.

1278973696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108 (or 87 counting only the distinct ones).

The product of its digits is 6858432, while the sum is 58.

The square root of 1278973696 is about 35762.7417293473. The cubic root of 1278973696 is about 1085.4767797061.

The spelling of 1278973696 in words is "one billion, two hundred seventy-eight million, nine hundred seventy-three thousand, six hundred ninety-six".