109439990 has 32 divisors (see below), whose sum is σ = 216303264. Its totient is φ = 39536640.

The previous prime is 109439989. The next prime is 109440041. The reversal of 109439990 is 99934901.

It is a super-2 number, since 2×109439990² = 23954222822400200, 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 (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14102 + ... + 20438.

It is an arithmetic number, because the mean of its divisors is an integer number (6759477).

Almost surely, 2^109439990 is an apocalyptic number.

109439990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

109439990 is a deficient number, since it is larger than the sum of its proper divisors (106863274).

109439990 is a wasteful number, since it uses less digits than its factorization.

109439990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6512.

The product of its (nonzero) digits is 78732, while the sum is 44.

The square root of 109439990 is about 10461.3569865482. The cubic root of 109439990 is about 478.3274980032.

The spelling of 109439990 in words is "one hundred nine million, four hundred thirty-nine thousand, nine hundred ninety".