1324026640 has 80 divisors (see below), whose sum is σ = 3267648000. Its totient is φ = 497203200.

The previous prime is 1324026617. The next prime is 1324026643. The reversal of 1324026640 is 466204231.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 1324026599 and 1324026608.

It is not an unprimeable number, because it can be changed into a prime (1324026643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 677665 + ... + 679615.

It is an arithmetic number, because the mean of its divisors is an integer number (40845600).

Almost surely, 2^1324026640 is an apocalyptic number.

1324026640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1324026640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1633824000).

1324026640 is an abundant number, since it is smaller than the sum of its proper divisors (1943621360).

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

1324026640 is a wasteful number, since it uses less digits than its factorization.

1324026640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2480 (or 2474 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 1324026640 is about 36387.1768621859. The cubic root of 1324026640 is about 1098.0755994985.

The spelling of 1324026640 in words is "one billion, three hundred twenty-four million, twenty-six thousand, six hundred forty".