1304340240 has 160 divisors (see below), whose sum is σ = 4719697920. Its totient is φ = 291773952.

The previous prime is 1304340239. The next prime is 1304340251. The reversal of 1304340240 is 420434031.

1304340240 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70701 + ... + 87219.

It is an arithmetic number, because the mean of its divisors is an integer number (29498112).

Almost surely, 2^1304340240 is an apocalyptic number.

1304340240 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 1304340240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2359848960).

1304340240 is an abundant number, since it is smaller than the sum of its proper divisors (3415357680).

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

1304340240 is a wasteful number, since it uses less digits than its factorization.

1304340240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16589 (or 16583 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 1304340240 is about 36115.6509009598. The cubic root of 1304340240 is about 1092.6061254160.

Adding to 1304340240 its reverse (420434031), we get a palindrome (1724774271).

The spelling of 1304340240 in words is "one billion, three hundred four million, three hundred forty thousand, two hundred forty".