1323625440 has 96 divisors (see below), whose sum is σ = 4414707360. Its totient is φ = 332201984.

The previous prime is 1323625409. The next prime is 1323625451. The reversal of 1323625440 is 445263231.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1323625398 and 1323625407.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72945 + ... + 89264.

It is an arithmetic number, because the mean of its divisors is an integer number (45986535).

Almost surely, 2^1323625440 is an apocalyptic number.

1323625440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1323625440 is an abundant number, since it is smaller than the sum of its proper divisors (3091081920).

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

1323625440 is a wasteful number, since it uses less digits than its factorization.

1323625440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162244 (or 162236 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 1323625440 is about 36381.6635133689. The cubic root of 1323625440 is about 1097.9646771494.

Adding to 1323625440 its reverse (445263231), we get a palindrome (1768888671).

The spelling of 1323625440 in words is "one billion, three hundred twenty-three million, six hundred twenty-five thousand, four hundred forty".