1205478984 has 16 divisors (see below), whose sum is σ = 3013697520. Its totient is φ = 401826320.

The previous prime is 1205478971. The next prime is 1205478991. The reversal of 1205478984 is 4898745021.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25114122 + ... + 25114169.

It is an arithmetic number, because the mean of its divisors is an integer number (188356095).

Almost surely, 2^1205478984 is an apocalyptic number.

It is an amenable number.

1205478984 is an abundant number, since it is smaller than the sum of its proper divisors (1808218536).

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

1205478984 is a wasteful number, since it uses less digits than its factorization.

1205478984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50228300 (or 50228296 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 48.

The square root of 1205478984 is about 34720.0084101372. The cubic root of 1205478984 is about 1064.2734165526.

The spelling of 1205478984 in words is "one billion, two hundred five million, four hundred seventy-eight thousand, nine hundred eighty-four".