40109838 has 24 divisors (see below), whose sum is σ = 83865768. Its totient is φ = 12787632.

The previous prime is 40109837. The next prime is 40109863. The reversal of 40109838 is 83890104.

It is a junction number, because it is equal to n+sod(n) for n = 40109799 and 40109808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40109831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3145 + ... + 9492.

It is an arithmetic number, because the mean of its divisors is an integer number (3494407).

Almost surely, 2^40109838 is an apocalyptic number.

40109838 is an abundant number, since it is smaller than the sum of its proper divisors (43755930).

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

40109838 is a wasteful number, since it uses less digits than its factorization.

40109838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12688 (or 12665 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 40109838 is about 6333.2328237639. The cubic root of 40109838 is about 342.3079371432.

The spelling of 40109838 in words is "forty million, one hundred nine thousand, eight hundred thirty-eight".