40081382 has 16 divisors (see below), whose sum is σ = 65696832. Its totient is φ = 18188520.

The previous prime is 40081381. The next prime is 40081399. The reversal of 40081382 is 28318004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40081381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17093 + ... + 19295.

It is an arithmetic number, because the mean of its divisors is an integer number (4106052).

Almost surely, 2^40081382 is an apocalyptic number.

40081382 is a deficient number, since it is larger than the sum of its proper divisors (25615450).

40081382 is a wasteful number, since it uses less digits than its factorization.

40081382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3043.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 40081382 is about 6330.9858631970. The cubic root of 40081382 is about 342.2269676556.

Adding to 40081382 its reverse (28318004), we get a palindrome (68399386).

The spelling of 40081382 in words is "forty million, eighty-one thousand, three hundred eighty-two".