1326019640 has 48 divisors (see below), whose sum is σ = 3279444840. Its totient is φ = 482187200.

The previous prime is 1326019609. The next prime is 1326019657. The reversal of 1326019640 is 469106231.

It is a junction number, because it is equal to n+sod(n) for n = 1326019597 and 1326019606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 132146 + ... + 141825.

Almost surely, 2^1326019640 is an apocalyptic number.

1326019640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1326019640 is an abundant number, since it is smaller than the sum of its proper divisors (1953425200).

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

1326019640 is a wasteful number, since it uses less digits than its factorization.

1326019640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274004 (or 273989 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 1326019640 is about 36414.5525854706. The cubic root of 1326019640 is about 1098.6262851756.

It can be divided in two parts, 132601 and 9640, that added together give a palindrome (142241).

The spelling of 1326019640 in words is "one billion, three hundred twenty-six million, nineteen thousand, six hundred forty".