9990250 has 32 divisors (see below), whose sum is σ = 18954000. Its totient is φ = 3942400.

The previous prime is 9990221. The next prime is 9990251. The reversal of 9990250 is 520999.

It can be written as a sum of positive squares in 8 ways, for example, as 48841 + 9941409 = 221^2 + 3153^2 .

It is not an unprimeable number, because it can be changed into a prime (9990251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22026 + ... + 22474.

Almost surely, 2^9990250 is an apocalyptic number.

9990250 is a deficient number, since it is larger than the sum of its proper divisors (8963750).

9990250 is a wasteful number, since it uses less digits than its factorization.

9990250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555 (or 545 counting only the distinct ones).

The product of its (nonzero) digits is 7290, while the sum is 34.

The square root of 9990250 is about 3160.7356738582. The cubic root of 9990250 is about 215.3734271072.

The spelling of 9990250 in words is "nine million, nine hundred ninety thousand, two hundred fifty".