9920250 has 48 divisors (see below), whose sum is σ = 26830440. Its totient is φ = 2644800.

The previous prime is 9920249. The next prime is 9920257. The reversal of 9920250 is 520299.

It can be written as a sum of positive squares in 4 ways, for example, as 974169 + 8946081 = 987^2 + 2991^2 .

It is a super-2 number, since 2×9920250² = 196822720125000, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (9920257) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46 + ... + 4454.

Almost surely, 2^9920250 is an apocalyptic number.

9920250 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 9920250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13415220).

9920250 is an abundant number, since it is smaller than the sum of its proper divisors (16910190).

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

9920250 is a wasteful number, since it uses less digits than its factorization.

9920250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4432 (or 4419 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 9920250 is about 3149.6428368944. The cubic root of 9920250 is about 214.8692191844.

The spelling of 9920250 in words is "nine million, nine hundred twenty thousand, two hundred fifty".