1326242820 has 72 divisors (see below), whose sum is σ = 4319771904. Its totient is φ = 303140544.

The previous prime is 1326242803. The next prime is 1326242831. The reversal of 1326242820 is 282426231.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 222612 + ... + 228491.

It is an arithmetic number, because the mean of its divisors is an integer number (59996832).

Almost surely, 2^1326242820 is an apocalyptic number.

1326242820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1326242820 is an abundant number, since it is smaller than the sum of its proper divisors (2993529084).

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

1326242820 is a wasteful number, since it uses less digits than its factorization.

1326242820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451129 (or 451120 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 1326242820 is about 36417.6168907302. The cubic root of 1326242820 is about 1098.6879176613.

The spelling of 1326242820 in words is "one billion, three hundred twenty-six million, two hundred forty-two thousand, eight hundred twenty".