999990354 has 128 divisors (see below), whose sum is σ = 2428289280. Its totient is φ = 270950400.

The previous prime is 999990353. The next prime is 999990359. The reversal of 999990354 is 453099999.

999990354 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 999990294 and 999990303.

It is not an unprimeable number, because it can be changed into a prime (999990353) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2375064 + ... + 2375484.

It is an arithmetic number, because the mean of its divisors is an integer number (18971010).

Almost surely, 2^999990354 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999990354, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1214144640).

999990354 is an abundant number, since it is smaller than the sum of its proper divisors (1428298926).

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

999990354 is a wasteful number, since it uses less digits than its factorization.

999990354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556.

The product of its (nonzero) digits is 3542940, while the sum is 57.

The square root of 999990354 is about 31622.6240846644. The cubic root of 999990354 is about 999.9967846563.

The spelling of 999990354 in words is "nine hundred ninety-nine million, nine hundred ninety thousand, three hundred fifty-four".