999786252 has 72 divisors (see below), whose sum is σ = 2563842960. Its totient is φ = 302812160.

The previous prime is 999786199. The next prime is 999786299. The reversal of 999786252 is 252687999.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 999786192 and 999786201.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95602 + ... + 105542.

It is an arithmetic number, because the mean of its divisors is an integer number (35608930).

Almost surely, 2^999786252 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 999786252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1281921480).

999786252 is an abundant number, since it is smaller than the sum of its proper divisors (1564056708).

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

999786252 is a wasteful number, since it uses less digits than its factorization.

999786252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10011 (or 9992 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 57.

The square root of 999786252 is about 31619.3967684395. The cubic root of 999786252 is about 999.9287455896.

The spelling of 999786252 in words is "nine hundred ninety-nine million, seven hundred eighty-six thousand, two hundred fifty-two".