1304581980 has 72 divisors (see below), whose sum is σ = 3955461552. Its totient is φ = 321125376.

The previous prime is 1304581969. The next prime is 1304581987. The reversal of 1304581980 is 891854031.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304581987) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54189 + ... + 74468.

It is an arithmetic number, because the mean of its divisors is an integer number (54936966).

Almost surely, 2^1304581980 is an apocalyptic number.

1304581980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1304581980 is an abundant number, since it is smaller than the sum of its proper divisors (2650879572).

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

1304581980 is a wasteful number, since it uses less digits than its factorization.

1304581980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128695 (or 128680 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 1304581980 is about 36118.9974943934. The cubic root of 1304581980 is about 1092.6736206602.

The spelling of 1304581980 in words is "one billion, three hundred four million, five hundred eighty-one thousand, nine hundred eighty".