9945400 has 24 divisors (see below), whose sum is σ = 23123520. Its totient is φ = 3978080.

The previous prime is 9945359. The next prime is 9945409. The reversal of 9945400 is 45499.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9945409) 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 5 ways as a sum of consecutive naturals, for example, 24664 + ... + 25063.

It is an arithmetic number, because the mean of its divisors is an integer number (963480).

Almost surely, 2^9945400 is an apocalyptic number.

It is an amenable number.

9945400 is an abundant number, since it is smaller than the sum of its proper divisors (13178120).

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

9945400 is a wasteful number, since it uses less digits than its factorization.

9945400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49743 (or 49734 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 9945400 is about 3153.6328258058. The cubic root of 9945400 is about 215.0506460821.

The spelling of 9945400 in words is "nine million, nine hundred forty-five thousand, four hundred".