40409292 has 96 divisors (see below), whose sum is σ = 118992384. Its totient is φ = 10368000.

The previous prime is 40409279. The next prime is 40409309. The reversal of 40409292 is 29290404.

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 31 ways as a sum of consecutive naturals, for example, 93108 + ... + 93540.

It is an arithmetic number, because the mean of its divisors is an integer number (1239504).

Almost surely, 2^40409292 is an apocalyptic number.

40409292 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40409292, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59496192).

40409292 is an abundant number, since it is smaller than the sum of its proper divisors (78583092).

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

40409292 is a wasteful number, since it uses less digits than its factorization.

40409292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559 (or 557 counting only the distinct ones).

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

The square root of 40409292 is about 6356.8303422382. The cubic root of 40409292 is about 343.1576990480.

Adding to 40409292 its reverse (29290404), we get a palindrome (69699696).

The spelling of 40409292 in words is "forty million, four hundred nine thousand, two hundred ninety-two".