109139040 has 144 divisors (see below), whose sum is σ = 392137200. Its totient is φ = 27565056.

The previous prime is 109139039. The next prime is 109139057. The reversal of 109139040 is 40931901.

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

It is a super-2 number, since 2×109139040² = 23822660104243200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 109138995 and 109139013.

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, 25366 + ... + 29354.

It is an arithmetic number, because the mean of its divisors is an integer number (2723175).

Almost surely, 2^109139040 is an apocalyptic number.

109139040 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 109139040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196068600).

109139040 is an abundant number, since it is smaller than the sum of its proper divisors (282998160).

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

109139040 is a wasteful number, since it uses less digits than its factorization.

109139040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4029 (or 4018 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 109139040 is about 10446.9631951108. The cubic root of 109139040 is about 477.8886431425. Note that the first 3 decimals are identical.

The spelling of 109139040 in words is "one hundred nine million, one hundred thirty-nine thousand, forty".