9945814 has 16 divisors (see below), whose sum is σ = 15420240. Its totient is φ = 4808160.

The previous prime is 9945781. The next prime is 9945841. The reversal of 9945814 is 4185499.

It is a super-2 number, since 2×9945814² = 197838432245192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8844 + ... + 9904.

It is an arithmetic number, because the mean of its divisors is an integer number (963765).

Almost surely, 2^9945814 is an apocalyptic number.

9945814 is a deficient number, since it is larger than the sum of its proper divisors (5474426).

9945814 is a wasteful number, since it uses less digits than its factorization.

9945814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1215.

The product of its digits is 51840, while the sum is 40.

The square root of 9945814 is about 3153.6984637089. The cubic root of 9945814 is about 215.0536300322.

The spelling of 9945814 in words is "nine million, nine hundred forty-five thousand, eight hundred fourteen".