40381392 has 120 divisors (see below), whose sum is σ = 115117632. Its totient is φ = 12185600.

The previous prime is 40381387. The next prime is 40381417. The reversal of 40381392 is 29318304.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 568717 + ... + 568787.

Almost surely, 2^40381392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40381392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57558816).

40381392 is an abundant number, since it is smaller than the sum of its proper divisors (74736240).

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

40381392 is a wasteful number, since it uses less digits than its factorization.

40381392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 40381392 is about 6354.6354734162. The cubic root of 40381392 is about 343.0787048067.

Adding to 40381392 its reverse (29318304), we get a palindrome (69699696).

The spelling of 40381392 in words is "forty million, three hundred eighty-one thousand, three hundred ninety-two".