9900378 has 24 divisors (see below), whose sum is σ = 21554208. Its totient is φ = 3284232.

The previous prime is 9900367. The next prime is 9900379. The reversal of 9900378 is 8730099.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9900379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2875 + ... + 5297.

It is an arithmetic number, because the mean of its divisors is an integer number (898092).

Almost surely, 2^9900378 is an apocalyptic number.

9900378 is an abundant number, since it is smaller than the sum of its proper divisors (11653830).

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

9900378 is a wasteful number, since it uses less digits than its factorization.

9900378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2658 (or 2655 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 9900378 is about 3146.4866120802. The cubic root of 9900378 is about 214.7256497042.

The spelling of 9900378 in words is "nine million, nine hundred thousand, three hundred seventy-eight".