1199005890 has 32 divisors (see below), whose sum is σ = 2878557696. Its totient is φ = 319630080.

The previous prime is 1199005877. The next prime is 1199005891. The reversal of 1199005890 is 985009911.

It is not an unprimeable number, because it can be changed into a prime (1199005891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140794 + ... + 149066.

It is an arithmetic number, because the mean of its divisors is an integer number (89954928).

Almost surely, 2^1199005890 is an apocalyptic number.

1199005890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1199005890 is an abundant number, since it is smaller than the sum of its proper divisors (1679551806).

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

1199005890 is a wasteful number, since it uses less digits than its factorization.

1199005890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13114.

The product of its (nonzero) digits is 29160, while the sum is 42.

The square root of 1199005890 is about 34626.6644365293. The cubic root of 1199005890 is about 1062.3650438047.

It can be divided in two parts, 119 and 9005890, that added together give a palindrome (9006009).

The spelling of 1199005890 in words is "one billion, one hundred ninety-nine million, five thousand, eight hundred ninety".