1323641278 has 8 divisors (see below), whose sum is σ = 1986246072. Its totient is φ = 661559256.

The previous prime is 1323641243. The next prime is 1323641279. The reversal of 1323641278 is 8721463231.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323641279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124300 + ... + 134527.

It is an arithmetic number, because the mean of its divisors is an integer number (248280759).

Almost surely, 2^1323641278 is an apocalyptic number.

1323641278 is a deficient number, since it is larger than the sum of its proper divisors (662604794).

1323641278 is a wasteful number, since it uses less digits than its factorization.

1323641278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261386.

The product of its digits is 48384, while the sum is 37.

The square root of 1323641278 is about 36381.8811773113. The cubic root of 1323641278 is about 1097.9690564082.

The spelling of 1323641278 in words is "one billion, three hundred twenty-three million, six hundred forty-one thousand, two hundred seventy-eight".