1304660280 has 384 divisors, whose sum is σ = 5188769280. Its totient is φ = 259015680.

The previous prime is 1304660237. The next prime is 1304660299. The reversal of 1304660280 is 820664031.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1487202 + ... + 1488078.

It is an arithmetic number, because the mean of its divisors is an integer number (13512420).

Almost surely, 2^1304660280 is an apocalyptic number.

1304660280 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 1304660280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2594384640).

1304660280 is an abundant number, since it is smaller than the sum of its proper divisors (3884109000).

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

1304660280 is a wasteful number, since it uses less digits than its factorization.

1304660280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939 (or 928 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 1304660280 is about 36120.0813952571. The cubic root of 1304660280 is about 1092.6954806977.

The spelling of 1304660280 in words is "one billion, three hundred four million, six hundred sixty thousand, two hundred eighty".