109215744 has 128 divisors (see below), whose sum is σ = 320859360. Its totient is φ = 32768000.

The previous prime is 109215739. The next prime is 109215763. The reversal of 109215744 is 447512901.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1081294 + ... + 1081394.

Almost surely, 2^109215744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 109215744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160429680).

109215744 is an abundant number, since it is smaller than the sum of its proper divisors (211643616).

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

109215744 is an equidigital number, since it uses as much as digits as its factorization.

109215744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 109215744 is about 10450.6336649985. The cubic root of 109215744 is about 478.0005718847. Note that the first 3 decimals are identical.

It can be divided in two parts, 1092 and 15744, that added together give a triangular number (16836 = T₁₈₃).

The spelling of 109215744 in words is "one hundred nine million, two hundred fifteen thousand, seven hundred forty-four".