1323645398 has 16 divisors (see below), whose sum is σ = 2113884864. Its totient is φ = 619447680.

The previous prime is 1323645371. The next prime is 1323645451. The reversal of 1323645398 is 8935463231.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101390 + ... + 113697.

It is an arithmetic number, because the mean of its divisors is an integer number (132117804).

Almost surely, 2^1323645398 is an apocalyptic number.

1323645398 is a deficient number, since it is larger than the sum of its proper divisors (790239466).

1323645398 is a wasteful number, since it uses less digits than its factorization.

1323645398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215287.

The product of its digits is 466560, while the sum is 44.

The square root of 1323645398 is about 36381.9377988584. The cubic root of 1323645398 is about 1097.9701955960.

The spelling of 1323645398 in words is "one billion, three hundred twenty-three million, six hundred forty-five thousand, three hundred ninety-eight".