40405392 has 50 divisors (see below), whose sum is σ = 116948678. Its totient is φ = 13468032.

The previous prime is 40405357. The next prime is 40405397. The reversal of 40405392 is 29350404.

It can be written as a sum of positive squares in only one way, i.e., 37896336 + 2509056 = 6156^2 + 1584^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (40405397) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 14293 + ... + 16884.

Almost surely, 2^40405392 is an apocalyptic number.

It is an amenable number.

40405392 is an abundant number, since it is smaller than the sum of its proper divisors (76543286).

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

40405392 is a wasteful number, since it uses less digits than its factorization.

40405392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31197 (or 31182 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 40405392 is about 6356.5235781833. The cubic root of 40405392 is about 343.1466590287.

Adding to 40405392 its reverse (29350404), we get a palindrome (69755796).

The spelling of 40405392 in words is "forty million, four hundred five thousand, three hundred ninety-two".