1305193980 has 48 divisors (see below), whose sum is σ = 3846890880. Its totient is φ = 329732928.

The previous prime is 1305193963. The next prime is 1305193993. The reversal of 1305193980 is 893915031.

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, 571314 + ... + 573593.

It is an arithmetic number, because the mean of its divisors is an integer number (80143560).

Almost surely, 2^1305193980 is an apocalyptic number.

1305193980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1305193980 is an abundant number, since it is smaller than the sum of its proper divisors (2541696900).

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

1305193980 is a wasteful number, since it uses less digits than its factorization.

1305193980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144938 (or 1144936 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 1305193980 is about 36127.4684969761. The cubic root of 1305193980 is about 1092.8444574301.

The spelling of 1305193980 in words is "one billion, three hundred five million, one hundred ninety-three thousand, nine hundred eighty".