1204999140 has 96 divisors (see below), whose sum is σ = 3494744064. Its totient is φ = 309905280.

The previous prime is 1204999139. The next prime is 1204999217. The reversal of 1204999140 is 419994021.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 644487 + ... + 646353.

It is an arithmetic number, because the mean of its divisors is an integer number (36403584).

Almost surely, 2^1204999140 is an apocalyptic number.

1204999140 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 1204999140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1747372032).

1204999140 is an abundant number, since it is smaller than the sum of its proper divisors (2289744924).

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

1204999140 is a wasteful number, since it uses less digits than its factorization.

1204999140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2257 (or 2255 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 1204999140 is about 34713.0975281665. The cubic root of 1204999140 is about 1064.1321855578.

The spelling of 1204999140 in words is "one billion, two hundred four million, nine hundred ninety-nine thousand, one hundred forty".