999241290 has 96 divisors (see below), whose sum is σ = 2690827776. Its totient is φ = 257005440.

The previous prime is 999241289. The next prime is 999241297. The reversal of 999241290 is 92142999.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (999241297) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 1553709 + ... + 1554351.

It is an arithmetic number, because the mean of its divisors is an integer number (28029456).

Almost surely, 2^999241290 is an apocalyptic number.

999241290 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 999241290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1345413888).

999241290 is an abundant number, since it is smaller than the sum of its proper divisors (1691586486).

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

999241290 is a wasteful number, since it uses less digits than its factorization.

999241290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244 (or 1241 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 999241290 is about 31610.7780669822. The cubic root of 999241290 is about 999.7470326796.

The spelling of 999241290 in words is "nine hundred ninety-nine million, two hundred forty-one thousand, two hundred ninety".