9975810 has 32 divisors (see below), whose sum is σ = 25784640. Its totient is φ = 2455488.

The previous prime is 9975803. The next prime is 9975827. The reversal of 9975810 is 185799.

It is a happy number.

It is a super-2 number, since 2×9975810² = 199033570312200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12400 + ... + 13179.

It is an arithmetic number, because the mean of its divisors is an integer number (805770).

Almost surely, 2^9975810 is an apocalyptic number.

9975810 is an abundant number, since it is smaller than the sum of its proper divisors (15808830).

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

9975810 is a wasteful number, since it uses less digits than its factorization.

9975810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25602.

The product of its (nonzero) digits is 22680, while the sum is 39.

The square root of 9975810 is about 3158.4505695040. The cubic root of 9975810 is about 215.2696094885.

The spelling of 9975810 in words is "nine million, nine hundred seventy-five thousand, eight hundred ten".