109635990 has 32 divisors (see below), whose sum is σ = 265463136. Its totient is φ = 28976640.

The previous prime is 109635989. The next prime is 109635991. The reversal of 109635990 is 99536901.

It is an interprime number because it is at equal distance from previous prime (109635989) and next prime (109635991).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109635991) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 12781 + ... + 19560.

It is an arithmetic number, because the mean of its divisors is an integer number (8295723).

Almost surely, 2^109635990 is an apocalyptic number.

109635990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

109635990 is an abundant number, since it is smaller than the sum of its proper divisors (155827146).

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

109635990 is a wasteful number, since it uses less digits than its factorization.

109635990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32464.

The product of its (nonzero) digits is 65610, while the sum is 42.

The square root of 109635990 is about 10470.7206055744. The cubic root of 109635990 is about 478.6128789905.

The spelling of 109635990 in words is "one hundred nine million, six hundred thirty-five thousand, nine hundred ninety".