1239215980 has 24 divisors (see below), whose sum is σ = 2665827360. Its totient is φ = 483596160.

The previous prime is 1239215897. The next prime is 1239215993. The reversal of 1239215980 is 895129321.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 754800 + ... + 756439.

It is an arithmetic number, because the mean of its divisors is an integer number (111076140).

Almost surely, 2^1239215980 is an apocalyptic number.

1239215980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1239215980 is an abundant number, since it is smaller than the sum of its proper divisors (1426611380).

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

1239215980 is a wasteful number, since it uses less digits than its factorization.

1239215980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1511289 (or 1511287 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 1239215980 is about 35202.4996271572. The cubic root of 1239215980 is about 1074.1105980495.

The spelling of 1239215980 in words is "one billion, two hundred thirty-nine million, two hundred fifteen thousand, nine hundred eighty".