1303320240 has 80 divisors (see below), whose sum is σ = 4489221600. Its totient is φ = 347551488.

The previous prime is 1303320229. The next prime is 1303320253. The reversal of 1303320240 is 420233031.

1303320240 is a `hidden beast` number, since 1 + 303 + 320 + 2 + 40 = 666.

1303320240 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 299535 + ... + 303854.

It is an arithmetic number, because the mean of its divisors is an integer number (56115270).

Almost surely, 2^1303320240 is an apocalyptic number.

1303320240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1303320240 is an abundant number, since it is smaller than the sum of its proper divisors (3185901360).

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

1303320240 is a wasteful number, since it uses less digits than its factorization.

1303320240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603411 (or 603399 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 1303320240 is about 36101.5268375176. The cubic root of 1303320240 is about 1092.3212434903.

Adding to 1303320240 its reverse (420233031), we get a palindrome (1723553271).

The spelling of 1303320240 in words is "one billion, three hundred three million, three hundred twenty thousand, two hundred forty".