999403452 has 72 divisors (see below), whose sum is σ = 2727073440. Its totient is φ = 307655040.

The previous prime is 999403421. The next prime is 999403453. The reversal of 999403452 is 254304999.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 999403398 and 999403407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999403453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3202 + ... + 44822.

It is an arithmetic number, because the mean of its divisors is an integer number (37876020).

Almost surely, 2^999403452 is an apocalyptic number.

999403452 is a gapful number since it is divisible by the number (92) 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 999403452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1363536720).

999403452 is an abundant number, since it is smaller than the sum of its proper divisors (1727669988).

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

999403452 is a wasteful number, since it uses less digits than its factorization.

999403452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41683 (or 41678 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The square root of 999403452 is about 31613.3429424982. The cubic root of 999403452 is about 999.8011111125.

The spelling of 999403452 in words is "nine hundred ninety-nine million, four hundred three thousand, four hundred fifty-two".