109939830 has 192 divisors, whose sum is σ = 361283328. Its totient is φ = 21047040.

The previous prime is 109939829. The next prime is 109939883. The reversal of 109939830 is 38939901.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 209949 + ... + 210471.

It is an arithmetic number, because the mean of its divisors is an integer number (1881684).

Almost surely, 2^109939830 is an apocalyptic number.

109939830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 109939830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180641664).

109939830 is an abundant number, since it is smaller than the sum of its proper divisors (251343498).

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

109939830 is a wasteful number, since it uses less digits than its factorization.

109939830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571 (or 564 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 109939830 is about 10485.2195971281. The cubic root of 109939830 is about 479.0546062168.

It can be divided in two parts, 109 and 939830, that added together give a palindrome (939939).

The spelling of 109939830 in words is "one hundred nine million, nine hundred thirty-nine thousand, eight hundred thirty".