40381292 has 18 divisors (see below), whose sum is σ = 82205172. Its totient is φ = 17306184.

The previous prime is 40381291. The next prime is 40381309. The reversal of 40381292 is 29218304.

It is not an unprimeable number, because it can be changed into a prime (40381291) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 102818 + ... + 103209.

It is an arithmetic number, because the mean of its divisors is an integer number (4566954).

Almost surely, 2^40381292 is an apocalyptic number.

It is an amenable number.

40381292 is an abundant number, since it is smaller than the sum of its proper divisors (41823880).

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

40381292 is a wasteful number, since it uses less digits than its factorization.

40381292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206045 (or 206036 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 40381292 is about 6354.6276051394. The cubic root of 40381292 is about 343.0784216078.

Adding to 40381292 its reverse (29218304), we get a palindrome (69599596).

The spelling of 40381292 in words is "forty million, three hundred eighty-one thousand, two hundred ninety-two".