109599990 has 64 divisors (see below), whose sum is σ = 273715200. Its totient is φ = 28052864.

The previous prime is 109599979. The next prime is 109600021. The reversal of 109599990 is 99995901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 228571 + ... + 229049.

It is an arithmetic number, because the mean of its divisors is an integer number (4276800).

Almost surely, 2^109599990 is an apocalyptic number.

109599990 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 109599990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136857600).

109599990 is an abundant number, since it is smaller than the sum of its proper divisors (164115210).

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

109599990 is a wasteful number, since it uses less digits than its factorization.

109599990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781.

The product of its (nonzero) digits is 295245, while the sum is 51.

The square root of 109599990 is about 10469.0013850415. The cubic root of 109599990 is about 478.5604875879.

The spelling of 109599990 in words is "one hundred nine million, five hundred ninety-nine thousand, nine hundred ninety".