109333728 has 144 divisors (see below), whose sum is σ = 358446816. Its totient is φ = 30965760.

The previous prime is 109333699. The next prime is 109333769. The reversal of 109333728 is 827333901.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 109333692 and 109333701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 388948 + ... + 389228.

It is an arithmetic number, because the mean of its divisors is an integer number (2489214).

Almost surely, 2^109333728 is an apocalyptic number.

109333728 is a gapful number since it is divisible by the number (18) 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 109333728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179223408).

109333728 is an abundant number, since it is smaller than the sum of its proper divisors (249113088).

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

109333728 is a wasteful number, since it uses less digits than its factorization.

109333728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497 (or 486 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 109333728 is about 10456.2769664924. The cubic root of 109333728 is about 478.1726353667.

The spelling of 109333728 in words is "one hundred nine million, three hundred thirty-three thousand, seven hundred twenty-eight".