1304130405840 has 80 divisors (see below), whose sum is σ = 4098185193408. Its totient is φ = 343004156928.

The previous prime is 1304130405833. The next prime is 1304130405857. The reversal of 1304130405840 is 485040314031.

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

It is a super-2 number, since 2×1304130405840² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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, 37200814 + ... + 37235853.

Almost surely, 2^{1304130405840} is an apocalyptic number.

1304130405840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1304130405840 is an abundant number, since it is smaller than the sum of its proper divisors (2794054787568).

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

1304130405840 is a wasteful number, since it uses less digits than its factorization.

1304130405840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74436756 (or 74436750 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

Adding to 1304130405840 its reverse (485040314031), we get a palindrome (1789170719871).

The spelling of 1304130405840 in words is "one trillion, three hundred four billion, one hundred thirty million, four hundred five thousand, eight hundred forty".