1273323878 has 16 divisors (see below), whose sum is σ = 1941760944. Its totient is φ = 626102400.

The previous prime is 1273323871. The next prime is 1273323911. The reversal of 1273323878 is 8783233721.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1273323871) 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, 74978 + ... + 90378.

It is an arithmetic number, because the mean of its divisors is an integer number (121360059).

Almost surely, 2^1273323878 is an apocalyptic number.

1273323878 is a deficient number, since it is larger than the sum of its proper divisors (668437066).

1273323878 is a wasteful number, since it uses less digits than its factorization.

1273323878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16087.

The product of its digits is 338688, while the sum is 44.

The square root of 1273323878 is about 35683.6640215099. The cubic root of 1273323878 is about 1083.8760694682.

The spelling of 1273323878 in words is "one billion, two hundred seventy-three million, three hundred twenty-three thousand, eight hundred seventy-eight".