109231440 has 80 divisors (see below), whose sum is σ = 343722048. Its totient is φ = 28689408.

The previous prime is 109231417. The next prime is 109231459. The reversal of 109231440 is 44132901.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 109231440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12684 + ... + 19476.

Almost surely, 2^109231440 is an apocalyptic number.

109231440 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 109231440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171861024).

109231440 is an abundant number, since it is smaller than the sum of its proper divisors (234490608).

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

109231440 is a wasteful number, since it uses less digits than its factorization.

109231440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6876 (or 6870 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 109231440 is about 10451.3845972675. The cubic root of 109231440 is about 478.0234694918.

The spelling of 109231440 in words is "one hundred nine million, two hundred thirty-one thousand, four hundred forty".