999906250 has 84 divisors (see below), whose sum is σ = 2184229854. Its totient is φ = 342300000.

The previous prime is 999906227. The next prime is 999906251. The reversal of 999906250 is 52609999.

It can be written as a sum of positive squares in 7 ways, for example, as 670447449 + 329458801 = 25893^2 + 18151^2 .

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a junction number, because it is equal to n+sod(n) for n = 999906194 and 999906203.

It is not an unprimeable number, because it can be changed into a prime (999906251) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 1530924 + ... + 1531576.

Almost surely, 2^999906250 is an apocalyptic number.

999906250 is an abundant number, since it is smaller than the sum of its proper divisors (1184323604).

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

999906250 is an frugal number, since it uses more digits than its factorization.

999906250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699 (or 667 counting only the distinct ones).

The product of its (nonzero) digits is 393660, while the sum is 49.

The square root of 999906250 is about 31621.2942492871. The cubic root of 999906250 is about 999.9687490234.

The spelling of 999906250 in words is "nine hundred ninety-nine million, nine hundred six thousand, two hundred fifty".