1323423240 has 64 divisors (see below), whose sum is σ = 3972663360. Its totient is φ = 352700160.

The previous prime is 1323423221. The next prime is 1323423251. The reversal of 1323423240 is 423243231.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1323423240.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 379987 + ... + 383453.

It is an arithmetic number, because the mean of its divisors is an integer number (62072865).

Almost surely, 2^1323423240 is an apocalyptic number.

1323423240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1323423240 is an abundant number, since it is smaller than the sum of its proper divisors (2649240120).

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

1323423240 is a wasteful number, since it uses less digits than its factorization.

1323423240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6662 (or 6658 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 1323423240 is about 36378.8845348507. The cubic root of 1323423240 is about 1097.9087651175.

Adding to 1323423240 its reverse (423243231), we get a palindrome (1746666471).

Subtracting from 1323423240 its reverse (423243231), we obtain a square (900180009 = 30003²).

The spelling of 1323423240 in words is "one billion, three hundred twenty-three million, four hundred twenty-three thousand, two hundred forty".