1379505980 has 48 divisors (see below), whose sum is σ = 2936213280. Its totient is φ = 544377600.

The previous prime is 1379505961. The next prime is 1379506003. The reversal of 1379505980 is 895059731.

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, 472766 + ... + 475674.

It is an arithmetic number, because the mean of its divisors is an integer number (61171110).

Almost surely, 2^1379505980 is an apocalyptic number.

1379505980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1379505980 is an abundant number, since it is smaller than the sum of its proper divisors (1556707300).

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

1379505980 is a wasteful number, since it uses less digits than its factorization.

1379505980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3230 (or 3228 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 47.

The square root of 1379505980 is about 37141.7013611385. The cubic root of 1379505980 is about 1113.2034129135.

The spelling of 1379505980 in words is "one billion, three hundred seventy-nine million, five hundred five thousand, nine hundred eighty".