999983628 has 108 divisors (see below), whose sum is σ = 2925227760. Its totient is φ = 282153600.

The previous prime is 999983603. The next prime is 999983629. The reversal of 999983628 is 826389999.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (999983629) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2570458 + ... + 2570846.

Almost surely, 2^999983628 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999983628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1462613880).

999983628 is an abundant number, since it is smaller than the sum of its proper divisors (1925244132).

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

999983628 is a wasteful number, since it uses less digits than its factorization.

999983628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608 (or 502 counting only the distinct ones).

The product of its digits is 15116544, while the sum is 63.

The square root of 999983628 is about 31622.5177365750. The cubic root of 999983628 is about 999.9945426369.

The spelling of 999983628 in words is "nine hundred ninety-nine million, nine hundred eighty-three thousand, six hundred twenty-eight".