9940090 has 12 divisors (see below), whose sum is σ = 17910126. Its totient is φ = 3972048.

The previous prime is 9940067. The next prime is 9940093. The reversal of 9940090 is 900499.

It can be written as a sum of positive squares in 3 ways, for example, as 9903609 + 36481 = 3147^2 + 191^2 .

It is not an unprimeable number, because it can be changed into a prime (9940093) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9472 + ... + 10468.

Almost surely, 2^9940090 is an apocalyptic number.

9940090 is a deficient number, since it is larger than the sum of its proper divisors (7970036).

9940090 is an frugal number, since it uses more digits than its factorization.

9940090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2001 (or 1004 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 9940090 is about 3152.7908271879. The cubic root of 9940090 is about 215.0123663340.

The spelling of 9940090 in words is "nine million, nine hundred forty thousand, ninety".