999603828 has 144 divisors (see below), whose sum is σ = 2782905216. Its totient is φ = 313061760.

The previous prime is 999603799. The next prime is 999603833. The reversal of 999603828 is 828306999.

999603828 is a `hidden beast` number, since 9 + 9 + 9 + 603 + 8 + 28 = 666.

999603828 is a nontrivial binomial coefficient, being equal to C(44713, 2).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1363350 + ... + 1364082.

Almost surely, 2^999603828 is an apocalyptic number.

999603828 is the 44712-nd triangular number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999603828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1391452608).

999603828 is an abundant number, since it is smaller than the sum of its proper divisors (1783301388).

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

999603828 is a wasteful number, since it uses less digits than its factorization.

999603828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836 (or 822 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The square root of 999603828 is about 31616.5119518267. The cubic root of 999603828 is about 999.8679252237.

The spelling of 999603828 in words is "nine hundred ninety-nine million, six hundred three thousand, eight hundred twenty-eight".