40183938 has 32 divisors (see below), whose sum is σ = 90409920. Its totient is φ = 13393188.

The previous prime is 40183909. The next prime is 40183939. The reversal of 40183938 is 83938104.

It is a super-2 number, since 2×40183938² = 3229497746375688, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40183939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220 + ... + 8967.

It is an arithmetic number, because the mean of its divisors is an integer number (2825310).

Almost surely, 2^40183938 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40183938, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45204960).

40183938 is an abundant number, since it is smaller than the sum of its proper divisors (50225982).

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

40183938 is an frugal number, since it uses more digits than its factorization.

40183938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9210 (or 9192 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 40183938 is about 6339.0802171924. The cubic root of 40183938 is about 342.5186037811.

The spelling of 40183938 in words is "forty million, one hundred eighty-three thousand, nine hundred thirty-eight".