109218240 has 112 divisors (see below), whose sum is σ = 385328160. Its totient is φ = 29122560.

The previous prime is 109218233. The next prime is 109218247. The reversal of 109218240 is 42812901.

It is an interprime number because it is at equal distance from previous prime (109218233) and next prime (109218247).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109218247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2320 + ... + 14960.

It is an arithmetic number, because the mean of its divisors is an integer number (3440430).

Almost surely, 2^109218240 is an apocalyptic number.

109218240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 109218240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192664080).

109218240 is an abundant number, since it is smaller than the sum of its proper divisors (276109920).

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

109218240 is a wasteful number, since it uses less digits than its factorization.

109218240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12667 (or 12651 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 109218240 is about 10450.7530829123. The cubic root of 109218240 is about 478.0042132411.

The spelling of 109218240 in words is "one hundred nine million, two hundred eighteen thousand, two hundred forty".