1320243408 has 80 divisors (see below), whose sum is σ = 4134110400. Its totient is φ = 400072320.

The previous prime is 1320243403. The next prime is 1320243427. The reversal of 1320243408 is 8043420231.

1320243408 is a `hidden beast` number, since 13 + 2 + 0 + 243 + 408 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320243403) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 134163 + ... + 143666.

It is an arithmetic number, because the mean of its divisors is an integer number (51676380).

Almost surely, 2^1320243408 is an apocalyptic number.

1320243408 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1320243408 is an abundant number, since it is smaller than the sum of its proper divisors (2813866992).

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

1320243408 is a wasteful number, since it uses less digits than its factorization.

1320243408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277857 (or 277845 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 1320243408 is about 36335.1538871105. The cubic root of 1320243408 is about 1097.0287328977.

Adding to 1320243408 its reverse (8043420231), we get a palindrome (9363663639).

The spelling of 1320243408 in words is "one billion, three hundred twenty million, two hundred forty-three thousand, four hundred eight".